Chapters On the day of her appointment at Ponyville's hospital, Derpy woke up feeling amazingly horny, which was apparently becoming her new normal ever since she'd taken note of her functionally limitless milk and shared it with Berry Punch. She'd grown, then, which had been amazing. Hefty G-cups, utterly ridiculous on her frame. Thick and prominent nipples which were difficult to hide. Whenever Derpy had spotted another pony taking note of the way they tented her shirt, they'd grown erect.
Thinking about her breasts certainly didn't help her arousal. She felt engorged, which was something which had literally never happened while she was actively nursing or in the time between weaning their daughters off and discovering that her milk hadn't dried up. Berry had already pointed out how little sense that made.
Derpy could feel her glands frantically brewing up more and more milk. She'd felt that way all the time for the last few days, but it was more intense at the moment. Perhaps she'd had a particularly motivating dream? She tried to remember, but the details had already slipped away. She'd had very large breasts in her dream, but she hadn't been big enough.
That feeling was also a new constant in her life.
Did she wake up horny every morning because of the dreams she was having? Or was a good night's sleep simply too long a time without playing with her boobs, so the new demands of her body made any dream steamier?
There was really no use denying that somehow, acknowledging the powers of her rack had kicked off changes which should have worried her. Instead, she felt delighted. She enjoyed the peculiar awareness of her breasts. Even her lust had taken on a new dimension. In addition to the familiar heat between her legs, her tits seemed to grow terribly sensitive. Keenly aware of her erect nipples under the bed cover, she hardly dared to move.
Derpy spent a few minutes holding still, enjoying the way her breasts throbbed insistently, sending arcs of pleasure into the rest of her body. She was pretty sure she could get herself off without immediately spraying milk all over the bed, but it seemed smarter to practice that kind of control some more.
Shouldn't she resent the fact that she apparently needed to get used to functioning day to day while highly aroused because her breasts had turned into sources of breathtaking pleasure? She didn't mind at all. She looked forward to growing bigger breasts, which would provide even more pleasure, so it only made sense to get used to that sort of thing now. She intended to do the best possible job of being a mother to Dinky and Ruby Pinch, after all. Self control was going to be of great importance.
Thinking of her family dulled the edge of her arousal. The heat seemed to pulse through her in slow, comfortable waves, and Derpy marveled once again at how cooperative her body was being. Even though during the last few days her mind had constantly wandered to her breasts and some of her fantasies had taken on an increasingly exhibitionistic bent, her escalating libido hadn't particularly hindered her in the daily business of taking care of their daughters.
Derpy supposed that if she squinted, it made some sense that something as maternal as her boobs wouldn't want to get in the way of her actually taking care of her family, even though they and her milk were never far from the forefront of her mind.
She strained her ears briefly, hearing Berry putter around in the kitchen. The other mare was an early riser. So were the fillies, but Berry was nice enough to let Derpy sleep in every so often. The earth pony was probably making breakfast for their daughters. Her voice was audible, since she tended to explain what she was doing when the kids were present.
At least Derpy knew that her attraction to the other mare had been growing before she'd discovered the power of her boobs. Berry had never much cared about other ponies, treating them nicely mainly because it was expedient, so seeing her put so much effort into caring for her own daughter and Dinky was a delight.
The fact that Berry enjoyed teasing Derpy about her rack and touching her breasts made the whole thing even better. Maybe Berry's general indifference regarding what other ponies thought had allowed her to voice fantasies Derpy had needed some encouragement to contemplate. She hoped there was more to discover about her breasts.
She wondered, not for the first time, what it would be like to have boobs so big they dominated her entire upper body. Maybe they could hang up mirrors on all the walls and the ceilings. It'd allow Derpy to admire herself from other angles, and she foresaw herself picking up a lot of things from behind her to keep her tits out of the way.
Derpy couldn't stifle a moan. Contemplating the adjustments huge breasts might make necessary inflamed her lust even more. Her back arched, she involuntarily bucked her hips. She badly wanted Berry's strong hands on her demanding tits. She wanted to be bigger. Wanted everyone in the whole town to be in awe. She wanted to let her milk flow unrestricted.
She threw off the covers and practically leapt out of bed, setting her breasts to jiggling. It would be better to finish this in the shower. It was hard to think of anything but her milk. She produced more, every moment, more than any one pony would need. The weight of all the milk she hadn't shared since her daughter was born seemed to press down, threatening to smother her mind.
As soon as she had closed the bathroom's door behind her, Derpy started probing her sex with a few fingers while playing with her clit. She came quickly, managing not to let down her milk with a heroic effort of willpower despite being rendered nearly insensate with bliss.
Her breasts apparently resented being left out. They churned and sloshed with her movements, and Derpy wasn't sure it was a real sound or just a sensation being sent directly into her brain. Internal pressure caused them to bloat, fat and round, until they sat high on her chest as unnaturally firm globes. There should have been discomfort, but the aching fullness felt like an amazing gift, already stirring her up again.
Over the last few days, this had begun to make more and more sense to Derpy. If her production was endless and her capacity infinite, or at least vastly greater than her size should allow, any degree of engorgement could only be meant to add variety to the intense pleasure her tits could unleash. Self-evident, really.
Derpy took a deep breath. Given the state of her boobs, she'd been prepared for the relief of her quick climax to be temporary. She turned to the mirror above the sink, greeted by her own self-satisfied smile. She wasn't the skinniest of pegasi, but even so, most observers would probably consider her tits to be wildly oversized for her frame. She found them highly attractive but simply not big enough.
She permitted a few tiny drops of milk to bead on her thick nipples. Berry found that degree of control to be impossibly ridiculous, but right now it was more difficult than during previous tries because Derpy's great glands still hadn't entirely settled back down to their usual level of production after whatever had riled them up in her dreams. They were so eager, so desperate to just gush endlessly until her appointment at the hospital later. She could tell everyone she met on the way that she was going to donate breastmilk, like it was the most obvious thing in the world.
Everyone needs to see and understand.
She turned a few degrees to the left and right, pivoting at the waist to set her boobs wobbling, feeling and watching their beautiful heft. She looked forward to more. Of course, her dreams of larger breasts and more milk were just desires and ambition, not an actual pressing need. Derpy was and would remain in control, even if it required a little practice. She'd set the pace on her path to impossibly vast tits, not her libido.
A minute release of control allowed her milk to run down along the lower slopes of her breasts in thin rivulets. She delighted in the way she could feel those trickles of milk move along her skin, so sensitive did her boobs get when they demanded to show what they could do.
There was a knock at the bathroom door. "Turn away from the mirror, Derps," Berry barked.
Derpy wiped a strand of drool away before it could drip onto her chest. "Sorry, got lost in thought!" Her friend had made the correct guess on not hearing her showering for ... there was no clock in the bathroom, but it must have been some time. Looking at her own breasts could be distracting. Another area she'd have to practice control if she wanted her boobs to take up more and more space at the lower edge of her vision, cleavage stretching ahead of her.
Time to take that shower, allow the milk to flow to calm her tits and bring herself off another time or three before facing the day. To Derpy's mounting regret, they didn't have a shower stall she might one day get stuck in, just a curtain around their tub.
She turned to face it and just for a moment, she was hit by a mental image of herself and Berry crammed into the bathtub as it overflowed with milk. Renewed arousal crashed through her, from her tits to her loins, and several powerful squirts of milk escaped before she reasserted control. Derpy had to steady herself against the wall momentarily.
She wasn't put off by the lapse, and anyway, it was delightful to find yet another fantasy. She'd suspected something of the sort when she had noticed that filling smaller containers with milk had been oddly enjoyable. The tub was probably a natural development of that.
Showering had become more significant since her boobs had ... woken up? Come alive? Especially when her sensitivity was up, the spray of water was unbearably pleasurable. More than that however, there was the mental component. The forceful spray of the shower head felt like equal parts motivation and challenge. It had only been a few days, but as far as she could tell, refusing to let her milk run free during the process meant she'd be significantly more easily distracted for the rest of the day, especially when encountering other ponies. In that state 'gush uncontrollably' had steadily moved to the top of her list of responses in any social interaction. It was, frankly, impractical, so she'd have to relegate that sort thing to weekends, or at least warn Berry in advance the next time she was going to go around in that state.
Fortunately, playing with herself in the shower was a decent way to avoid making a mess, and giving her eager tits the attention they deserved would give her a few hours during which her rack would be largely unaffected by her heightened libido. Derpy suspected 'horny' was her new healthy rest state, but it tended to be a pleasant, languid heat which hadn't been too distracting. Would neglecting her great abundance turn her lust from comfy to desperate and make her more likely to have flashes of lewd fantasies, or did her simmering arousal naturally come to a boil sooner or later, causing her rack to respond with increased production and a demand to release some of her bounty? It was too early to come to conclusions. Maybe it was a vicious cycle of both, made worse whenever there were ponies present who didn't already know what Derpy was now capable of.
All Derpy knew was that when her boobs were calm, it was her choice to dispense milk. Once she started feeling backed up and engorged, it instead required a constant effort of will to keep the milk in. The shower was an ideal place to blow off steam and waste a lot of milk to satisfy her great glands that she was still aware that she'd never run out. She was dimly aware that other ponies would be concerned about suddenly having to manage the severity of their constant arousal and how it interacted with constant milk production.
Derpy took the shower head in hand to aim the water at the undersides of her boobs. She wondered how long it would take her to get so large it would be faster to have Berry help her clean her awesome milk factories. Derpy also wondered idly how the other mare would tease her with the bathtub fantasy. She'd probably go 'Huh.' and then innocently ask if a lake bed counted as a container.
The image of Derpy filling up the nearby dam's reservoir with her milk while Berry massaged her tits slammed into her mind, displacing all coherent thought for several moments. Derpy groaned, going weak in the knees. She tried to adjust her stance and nearly lost her footing. Extending her wings to aid in balance, she pushed away the shower curtain until it hung outside the tub and failed to protect the floor from the water.
It might have been worse if the shower head had still been up on its mounting. She dropped it into the tub, which didn't entirely help matters as the spray's force turned the loose nozzle to and fro. Derpy scrambled to pick it up and ended up gracelessly flopping down into the tub, bumping knees and elbows painfully.
She sighed. On review, she hadn't felt very horny in that startling moment where she thought she was about to slip and bust her head open. The flow of her milk had stopped as well, which probably meant she'd wasted enough to appease her breasts. With some effort, she managed to pull the curtain back inside the tub.
"Ugh."
She felt clumsy and embarrassed about it. Her tits weren't quite large enough to serve as an excuse for lack of coordination. Of course, Derpy had never been one to dwell on minor frustrations for long. She assumed a sitting position as though she were taking a bath. Climaxing as easily as she did was delightful, but that didn't make it less satisfying to actually put in an effort and masturbate with intent.
Using one hand to spread her lower lips, she held the shower's nozzle close to her sex, moaning at the stimulation. "Mmmh, I need you, Berry." Derpy imagined herself with melons fat enough to get stuck in the tub, making it necessary for the strong earth pony to rescue her while fountains of milk erupted from huge nipples. Maybe if Derpy's arms were trapped under her tits, Berry would just dig her rough fingers into her swollen jugs to try and pull her out.
Her depths clenched on nothing as escalating waves of pleasure rocked her. She sprayed milk from twitching nipples, not because she needed to but for the sheer delight of it. Derpy didn't even need to touch her breasts, the memory of the first time Berry had groped them forcefully at her command was still amazingly vivid in her mind and on her skin. The combined pleasure from her nethers and breasts left her convulsing wildly, a vast storm of bliss swallowing up her thoughts as her eyes rolled back. By the time some remnant of coherent thought decided that her clit could use a little more directed attention, her own touch served as little more than the trigger to an immense, noisy orgasm.
She used the shower head to give herself another once-over once she'd called a halt to her milk output. While it was nice that her efforts were well rewarded, she was eager to find out what it'd feel like to actually make love to Berry beyond having her massage Derpy's breasts.
She got up and turned off the water. As expected, water had run down the curtain while it was outside the tub's edge. It was a right mess, but the clean-up seemed worth it to Derpy. She examined that thought, wondering about it. A month ago she'd have been quite annoyed at the mess. She'd been bothered by her clumsiness earlier. But it could be traced back to her boobs and the pleasure they brought, so the extra work of cleaning up didn't bring her mood down. Still, even if she wasn't bothered, it was pretty clear that Berry's idea for a dedicated shower room would already be useful right now, if only for better footing than the shape of the tub allowed.
She shrugged and set to the task unhurriedly. "Berry! Bit of a flood!"
"What sort?"
"Water!" The clarification had only become necessary recently, so Derpy forgave herself for the oversight.
Derpy heard somepony enter the mix of office and examination room, but she didn't stop gently rubbing her large, yet firm G-cups until Redheart had crossed the room and taken a seat. Only then did she take her hands out from under her shirt. She'd come braless, as was her habit, and now she encouraged a few drops of milk to bead on her nipples. She'd indulged herself sufficiently today to make control easy. The cheap two-bit shirt, which had practically come threadbare from the store, immediately clung to her stiff, prominent nubs.
Redheart was of unremarkable height. She had fairly wide hips to Derpy's eyes, although growing up in Cloudsdale with no earth ponies around might have skewed her sensibilities. She couldn't recall meeting an earth pony she'd accuse of having narrow hips. The nurse's breasts were smaller than Derpy's, which was true for most local mares after her recent growth. The young mare probably turned quite a few heads, although Derpy herself was attracted to tall ponies with some muscle on them. The earth pony's beauty was marred by the fact that the mare just looked tired. She'd picked a stressful career.
The nurse made a valiant effort not to stare. "W-well Miss Hooves. The bloodwork checks out, and there were no irregularities found in the samples you provided." The earth pony frowned. "My colleagues were ... impressed?"
"That's good to know," Derpy smiled. "I don't actually know what can go wrong with breast milk, so I wanted to be certain. Ever since I noticed mine hadn't dried up after I stopped breastfeeding, I've been hand-expressing and massaging them, and my libido has been spectacular. Didn't know if that had, uh, hormonal implications." There was pretty clearly some magic nonsense in play as well, to explain the extraordinary, apparently unlimited amount of milk she could produce.
The nurse kept her eyes on her desk. "Well, as I said, there's nothing wrong with your milk. Are you having sexual urges more often than you're comfortable with? Libido and sexual arousal are quite subjective, you know, so I can hardly tell you 'this is too much'. Your quality of life is what matters."
Derpy nodded, as if in thought. "Well, I masturbate several times a day, and climax several more times, I guess you could say through mental stimulation?" She shrugged. It was fun to share that but not as fun as stunning the nurse with displays of her rack's abundance would be. "That's actually really convenient if I can't find the opportunity to, uh, touch myself. I mean, I'm a 'grown-ass mare', as my friend Berry might say, I've got my responsibilities and can't just sneak off at will to play with myself. And I don't have to," she concluded with satisfaction.
Nurse Redheart nodded after a lengthy pause. "Alright. You're officially a milk donor. Will you need additional collection bottles?"
"Oh yes." Derpy attempted to smile innocently while the wet patches on her shirt spread. "As many as you can reasonably spare for a single donor. I have a lot to give." She sat up straighter, even arched her back a little. "I can't go a minute without thinking about how full I am, know what I mean? Getting any of that milk out is such a relief. Getting to help foals makes it even better."
"Ah, well, I don't. I don't know what you mean, that is." The nurse blushed, which was a more interesting reaction than what she'd had to talk of masturbation. "While we welcome donations, if you're experiencing discomfort, perhaps you should consider suppressing your milk? As I recall, your own daughter is old enough you’re probably not nursing anymore?"
"That's a shame." Derpy laughed lightly. According to Berry she had a very nice laugh. "I want more milk, not less."
Derpy hadn't needed to wear a bra in some time. According to Berry, who'd been fairly blasé about how much control Derpy had over her lactation and just how much milk there was to go around, that counted as some kind of 'bullshit superpower'. Derpy's own rack had only just enough sag to it to avoid seeming fake. It had heft and weight to it, and she wanted more of that.
"M-more?" This seemed to fluster Redheart.
"Mhm. I get that for most mares this isn't that great, but I love feeling my tits get fuller and tighter." The mammaries in question began growing taut.
If Derpy wanted to kill an hour or two doing nothing productive, she could spill far more milk than would ever conceivable fit into her jugs, or could have been produced by her glands. She didn't eat any more than before either. Clearly, as she'd contemplated that morning, her lactation and milk retention had at some point ceased being any kind of sensible biological process. It was magic nonsense from top to bottom. The ability to even feel full and engorged when she thought about it was, at this point, essentially a sex toy.
And Derpy loved it.
Her nipples throbbed. "Trying to hold it all in drives me wild." She focused on the memory of waking up desperately full, of having to gush uncontrollably in the shower to render her boobs calmer, more easily controlled. "Since I don't wear bras, I'm very familiar with the way my breasts move. And then it all changes. When they're so utterly packed, so bloated with milk, every little movement should hurt. But it just reminds me of ... of - " Derpy spending several seconds looking for a word didn't seem to bother the apparently transfixed earth pony. It also gave her boobs time to react to her thoughts. They rose to sit high and proud on her chest, with nipples appearing to reach out to hungry mouths. "Abundance! That's it. It's a wonderful feeling. Lactating has never been anything less than blissful, but when I'm this stuffed, the release is ... words don't do it justice. I wish you could feel it."
"Me too," Redheart sighed before her eyes widened. "I mean, that is, uh. Your experience is quite, quite fascinating, medically speaking." She clumsily grabbed for a notepad and pen and acted as though she was taking notes while squirming uncomfortably in her seat.
"I'm glad I could share this with a professional," Derpy stated, trying to sound casual. She probably wasn't any less aroused than Redheart, but she was confident that she functioned a lot better near the edge of climax. She decided to supply some more information and play along with the pretense that she wasn't just teasing the hell out of the poor nurse. "It's different when I'm providing for children. Nursing my foals was a perfectly innocent sort of emotional intimacy. My partner also mostly needs emotional intimacy, even though she doesn't mind playing with my breasts. But something about the fact that I'm still lactating so much, that there's always more for me to have fun with, no matter how much I waste for my own pleasure, it just ...well, that starts being very arousing."
"Mhm, I see." More distracted scribbling. Redheart had stopped pretending like she wasn't looking at Derpy's amazing tits.
It was time to go in for the kill. Derpy stood abruptly, her overfull breasts ready, as ever, to start spraying milk everywhere, preferably into waiting mouths. Still, her clarity of thought didn't meaningfully diminish. Her boobs remained obedient for now. "I'm sorry," she pretended at being shy. "I'm going to have to use your sink. I'm not sure I'd make it home without embarrassing myself."
"That's alr-"
Before the nurse could finish, Derpy hiked up her shirt, exposing her gloriously engorged tits to the air. Milk continuously beaded on her nipples, streaming down her breasts in rivulets. "Feel free to observe and take notes." She pulled the shirt off over her head, then strode over to the sink. At this point she didn't technically have to touch them, but even entirely pragmatic milking motions enhanced the experience.
Derpy waited for a moment while Nurse Redheart stood and hesitantly moved closer. Then she grasped her breasts, squeezed them together and rubbed firmly towards her fat nubs. Derpy found them very pretty, as she found every aspect of her rack beautiful, but objectively they were a little over scale even for G-cup breasts. That just made them more enticing, and she only had to look down to observe how impossible they were to hide by thin garments to get an erotic thrill.
Derpy was pretty confident that no other creature around Ponyville could gush quite like she could. She sprayed milk into the sink, it practically foamed from the force of it. Her peaks stung from the friction as Derpy called for more . They'd be sore later, but right now it was worth it to see Redheart's jaw hang loose and the pen slip from her hand. The poor mare was flushed with arousal and sweating, and the fact that the amount of milk Derpy's tits were disgorging was clearly quite beyond anything that could be expected even from a mare of her size didn't help.
Although seeing another pony so shocked by her productivity really got her hot and bothered, Derpy made sure not to overflow the sink. Control could be a little harder to maintain once she was aroused herself.
She hadn't gotten particularly creative with her own milking and had expected a fairly unremarkable climax, but the fact that she had been able to show her tits to someone who was practically a stranger and given her just the smallest hint at what her pair was capable of enhanced the experience a great deal. Pleasure blasted her mind and she had to let go of her chest, steadying herself against the sink and the wall. Only her recent intense practice in the field of masturbation kept her knees from buckling under her. Cracking her head open on the sink would have been kind of a shitty end to the day. Derpy made no particular effort to not moan lewdly.
The earth pony must have either been a lot more pent up or had a lot less practice with orgasms than Derpy, she groaned, sank against the wall and sort of slid down.
"It looks like you really needed that," Derpy observed kindly. She made no move to put her shirt back on.
Redheart was panting, apparently struggling to recover from the experience. "That was ... that was entirely unprofessional!"
Derpy started laughing. "I'm one of the least professional mares in town, nurse." She patted the sides of her breasts. "Think I started going around without a bra and the thinnest shirts I can find for anything but getting my personal kicks out of making ponies look? This rack is for sharing. Your reaction is a compliment!"
Redheart seemed to mull this over. Or perhaps she was still too embarrassed to talk. She shifted her position to hug her knees to herself.
Derpy began to wonder if the mare was under stress because of pressure she put on herself to act professionally. Maybe she'd been worried about being fairly fresh out of nursing school or something. She wouldn't want her display to damage the earth pony. "I think we should lock the door while we sort this out."
That idea got Redheart in motion, she reached into a pocket and tossed a key at Derpy.
It was the work of a moment to lock the door, then sit down cross legged in front of the nurse. She began to suspect that being brought to climax at her workplace felt like a transgression that Redheart beat herself up over. The earth pony needed to be distracted from that.
I need to share more.
Thankfully there were no emotional problems that couldn't be solved with a pair of excellent tits. "Hey, check this out." She thrust out her chest, prodding her breasts so they jiggled, groping them so the flesh yielded to her fingers.
"What." Well, being annoyed at Derpy for being lewd was better than self-recriminations, and the nurse at least didn't look away.
Derpy reached out to take Redheart's hand. "After all this trouble, I can at least let you feel them." The other mare didn't resist when Derpy placed her hand on her chest. "Observe."
Redheart didn't do anything with her hand on a boob, but she did seem less impatient, now.
"I swear I can feel the glands happily humming away, producing more milk." She kind of wished the other pony could feel it, but her tits did not actually vibrate.
"Well, after that display just now, they've got their work cut out for them," Redheart observed drily.
Derpy tried not to sound too smug. "That would make sense, yes." She very deliberately thought about how the milk she produced was apparently stored nowhere and then called forth from nowhere in frankly ridiculous quantities. Like an extremely grudging concession to reality, her breasts began to grow taut once more. Derpy smirked, but decided not to egg herself on any further.
Redheart also noticed the change. "You can't possibly be getting full again," she declared, incredulously.
Obviously her understanding was still incomplete. "That's the thing. I never stopped being full. If I had wanted to, I could still be standing at the sink, giving milk." She patted her own jugs once more. "This? Pretty much just for teasing myself and others."
The nurse considered this for a long minute. "That is fucking ridiculous," Redheart eventually stated firmly.
Derpy smiled gently. "Pretty much. But you know what the most useful part has been, since I stopped nursing my daughters?"
"Never buying milk again?" Her tone suggested that Redheart was trying to make a joke.
"That's a bonus, sure." Derpy shook her head. "They're not just good for getting myself or others off, y'know. Handled right, they're incredibly relaxing." She started gently brushing her palms across their sides. "A light touch, nothing more, and suddenly thinking about what they can do ... centers me. Tension goes away. Life feels right. Berry calls it 'meditating on my tits'." She shrugged. "We're raising two young fillies. Quick, low-effort de-stressing is an incredible gift."
Redheart frowned. "Now I'm really jealous."
Share it.
Derpy stood, moving towards the desk. "You should have a taste." An empty mug on the table seemed like a suitable vessel.
"Uh, why? We're not that close." Redheart stood up regardless.
"Humor me. I want to help you, I got a good feeling about it, and since very little about my boobs makes sense anyway, we hardly need a better reason." She proceeded to squeeze some milk into the mug.
"I can't believe I'm doing this. I'm not actually a lesbian, you know?" She reached for the mug.
Derpy shrugged. "That's not really relevant to me. If you spent all that time earlier wondering what it'd be like if your own rack was this awesome, that's cool. They seem like a very nice pair. I wish you three the best."
For some reason, the nurse rolled her eyes. "Fair enough." Redheart took a careful sip.
She felt herself growing. Derpy had hoped for this. She held her breasts as they swelled slightly. It was over far too quickly, she wasn't even sure she'd grown into the next cup size. Still, she wasn't feeling particularly disappointed. She wasn't real close to Redheart, and she'd already had a diffuse boob feeling that the more impressive growth from feeding Berry might remain unique, a result of the emotional intimacy. She loved the children, too, of course, but the kids weren't very complex ponies yet, so Derpy hadn't questioned that feeding them had caused little enough swelling to seem totally natural.
One day I'll have the biggest rack in Equestria.
As enticing that idea was, and she planned to thoroughly explore it in private later on, Derpy always reminded herself that she'd have to pace herself carefully over the next years. She certainly wasn't going to pursue growth until it limited her ability to run her household while her kids hadn't moved out.
Redheart winced, apparently she now filled her bra more than was strictly comfortable. "Celestia, I think I'm lactating, too. Did you know this would happen?"
"No," Derpy stated honestly. "Berry didn't change at all, but she would have hated it anyway. I grew a little more, then, not sure yet what, uh, variable that depends on." She tried to sound encouraging. "Go on, see how they feel if you treat them gently."
Redheart returned to her seat at her desk. She appeared to feel rather silly about carefully massaging her own chest through her clothes, but soon her expression softened. "I'll be damned. I think it's working."
Derpy had an extremely small sample size to work with so she wasn't actually totally sure whether the calming effect of her breasts was something special she'd just magically shared with Redheart, or if that sort of thing really worked for any mare and she'd just given the nurse a placebo that made it seem sensible and rational to essentially fondle herself at work. She herself hadn't done that sort of thing before her onset of lactation, anyway.
"Being a nurse is a tough job. I hope it helps a little." Besides, Ponyville General didn't seem to have much staff. Maybe some bean counter had decided that the current roster was sufficient for Ponyville while ignoring the dozen or more smaller farming communities whose citizens would rather make the trip to this hospital before taking a train to intimidating Canterlot to look for a specialist when their home remedies fell short.
Redheart nodded, then froze. "But if your milk changes ponies, we can't just feed it to foals, here. Who knows what it'll do?"
"It'll do nothing but feed them," Ditzy declared firmly. "You're a grown mare. I wanted to help, and you were open to it. It won't change anyone against their will and it won't change anyone who can't want it. To foals, it's just milk. Listen to your breasts. You know it's true."
Redheart contemplated her own rack for a moment. "Why am I sure that you're right?"
"Boob insight!"
The nurse was not amused.
Derpy sighed. "Look, sometimes I just know stuff about my rack, that's why I thought giving you milk might help you out." She frowned in thought. "How about I bring in the kids for an examination. Ruby Pinch isn't related to me by blood but she probably had more of my milk than Berry's, nursing did not agree with that mare at all. You'll see they're just fine."
"That seems more than fair," Redheart agreed. "Thanks, I guess."
"I love to share!" Derpy grabbed her shirt, slung it over a shoulder and turned to the door so she might unlock it and return the key to Redheart.
"Shouldn't you put that on, first?"
"I want to see how far I get before someone says something."
The earth pony heaved a sigh. "I don't want a topless mare walking out of my office."
Derpy paused, nodded. "I'm not here to get you in trouble." She put on the damp shirt, feeling a little bad for her lack of consideration. Showing herself off in public was one thing, but she wouldn't want to hurt another pony's professional reputation. Her arousal was rising from its new 'normal' background levels again.
"There's a bathroom right down the hall." Redheart sounded resigned. Apparently she assumed that Derpy's concession was strictly not to come out of her office topless, not to give up on the idea to walk or fly home without a shirt on entirely. "Wait at reception and I'll get you those bottles."
"You know me already!" Derpy called out happily and left with a last wave.
She hurried to the bathroom unsteadily as the implications of what just happened kicked off a tsunami of lust. Once there, Derpy tore off her shirt again, wadded it up and bit down on a portion of it to muffle her moans.
I can change people!
She came, hard, then wondered if she would ever be able to look at a mare again without wondering what they'd look like with bigger, milkier boobs. Her nipples quivered, and Derpy made no effort to hold back arcs of milk from splashing against the mirror. She felt twin twinges deep within her breasts, as though her glands were eager to help make Ponyville a much bustier place.
But the idea didn't escalate her barely controlled arousal further, which Derpy appreciated. She wasn't actually particularly into any breasts that weren't her own, after all.
Redheart wanted it.
Derpy supposed that she wouldn't have been opposed to granting the nurse slightly bigger boobs and a personal supply of milk. But something like that was usually a private desire. Could her milk just tell? Berry would have been pretty annoyed to be lactating again, so clearly it didn't do anything ponies wouldn't want? Derpy's arousal began feeling less pressing as she thought. She liked the idea of granting the gift of boobs, but wondered if this latest ability of her tits could tell good reasons from bad. Some people were unhappy with their appearance because others had made them unhappy - there'd been plenty of ponies who'd tried to give Berry grief for her big, chunky, nearly masculine frame, and another mare in the same position might not simply enjoy the excuse to punch someone in the face.
She milked herself gently, enjoying the soothing effect such tender treatment had. She remained certain that her tits were a force for good, but it would be careless not to ask questions of that sort. In her head, she sternly commanded her tits to be thoughtful with the ability.
They throbbed as if in response. Derpy was not hit by a sudden wash of renewed pleasure, so at least her rack wasn't trying to distract her from her thoughts. Still, since Redheart had appeared pretty happy with her minor changes, Derpy didn't see any harm in fantasies about this new ability. Maybe one day she'd feed a mare who wanted to be extraordinarily fertile? Derpy would offer to help nurse any arbitrarily large brood of ponies, of course. More mouths to feed meant more growth and more milk.
She hummed pleasantly, feeling enjoyably horny but without an absolutely pressing need to get off again. She'd walk home instead of flying, to get ponies used to the idea that Derpy might pass by soaked with her own milk and clearly aroused. It was an ongoing project to desensitize Ponyville for a future were Derpy would be impossible to ignore or overlook.
It would be fun to think about turning Ponyville into the titty capital of Equestria. Derpy put her shirt back on while wondering how the math would look. How much tit per capita would it take to earn that title? Derpy would never force anything on another grown pony they didn't want, but even if only very few locals wanted bigger boobs, Derpy's own growth would eventually have a significant impact on the crucial 'titflesh per capita' statistic, first for Ponyville, then Equestria, and perhaps even the world.
Maybe Berry would help her write down all these thrilling fantasies. Nobody could accuse Berry of having a filthy mind without seeming ridiculous, but she also had few of the inhibitions other ponies might have when it came to thinking up and voicing such ideas, as Derpy had learned to her delight.
Author's Note
A chapter from a calmer perspective. This was something of an experiment. If it doesn't work for you, don't worry, the other stories I'm preparing are from Derpy's perspective.
Sharing the Love
Derpy had come home from the hospital looking happy, with bags full of empty bottles and, apparently, slightly larger breasts. Berry knew empty containers were another item on the list of things which made the pegasus randy when she thought about them for too long. It was a growing list. To her credit, during the last week, Derpy had been just as attentive a mother as always.
Nonetheless, Berry made a mental note to get her hands on an empty rainwater barrel and place it so Derpy would bump into it. Just to further learn about her needs and preferences, of course.
Berry had seen the signs. Derpy's hands had trembled. There'd been a tension to her body. Derpy pretty much always smiled at the world, but her smile had been a lot more smug than usual. She'd never been body shy, of course, but recently Berry suspected her friend and lover would enjoy nothing more than being called out in public for being randy as hell.
When Berry suggested that they talk about Derpy's day once the kids were in bed, the pegasus had bitten her lip as her breasts started leaking slightly. She'd soldiered on, only occasionally stooping to take a few deep breaths or lightly massaging her own boobs, which, for some bizarre reason, tended to dial her down slightly.
And if the pegasus was a bit distracted, Berry didn't mind picking up the slack and preparing dinner. She had no special love for household tasks, but preparing food always felt reassuring, and in any case all the work that went into their little family still felt very much like a victory. As Berry was relatively sure she'd eventually live to see thirty without serving a prison sentence, she could also enjoy the petty spite of proving her mother wrong about the likely course of her life.
The day was much too nice for Berry to be thinking about her upbringing. Her life was much too nice for that, now.
Still, Berry was surprised to find herself actually being a little nervous about having sex with Derpy. It was a feeling she was unfamiliar with. Her previous lays had been strictly goal-oriented and she hadn't really considered getting into a sexual relationship with anyone now that she had a daughter. She was generally too indifferent to ponies. Derpy had long been one of the few positive exceptions and it hadn't occurred to Berry to think of her friend that way before. But since this was Derpy , she didn't resent the threat of more complexity in her life, because her friend was nothing if not patient.
Besides, it was laughably easy to get Derpy off. All she needed to do was talk about the mare's fantasies, or come up with new escalations of her favorite ideas involving breast growth and milk. As though giving voice to them made them more powerful than just having them rattling around in Derpy's head, where she could push them away as unrealistic. Perhaps she only needed to talk about how easy it would be, since Derpy apparently considered her heightened libido to be a bonus.
Since it was still summer, the sun stayed up longer than their daughters were allowed to and it was still light when they were both sharing the bench on the back porch. Derpy was already dressed for bed, which meant loose shorts and nothing else. Evidently she didn't really care that their back yard was still fairly easy to see into.
Well, Berry had always struggled to pretend like she cared what other ponies were thinking, and the shadows had gotten longer, so she wasn't going to complain. Pushing aside the table they had on the porch, she patted her own thighs. "Get comfy and talk."
Derpy got the message and relocated to Berry's lap. She sighed happily and leaned into her, apparently just taking a moment to enjoy the closeness.
Berry clasped her arms around Derpy's stomach. "How long until you're heavy enough to make my legs go numb?" She didn't know if even Derpy's short term fantasies would become real, but Berry got a thrill out of playing along and seeing what it did to her friend. This, too, was a feeling she had little experience with.
The pegasus groaned through clenched teeth, writhing in place. Spurts of milk arced to the ground. Berry was pretty sure that only concern for their daughters' sleep kept Derpy from making a lot more noise than that.
"Today was amazing, Berry," the mare eventually managed to say. "They – they wanted to take a sample. With a pump! But it couldn't keep up." She giggled. "I told them I prefer to do it by hand. I warned them. Didn't like the pump. So I just ... cut loose. Milk kept squirting out from under the funnel, my other nipple was just gushing . It was a mess."
Derpy blew out a breath and didn't say anything for a while. Berry could feel the smaller pony's pulse race, so she reasoned her friend was taking a moment to try and push off her impending climax some more.
"Well, I know you only feed ponies as much as they can stand, but did ya resent the machine trying to take your milk on its own terms?"
The only response was a nod.
"Maybe one day we'll hook you up to a big cow milking machine." Berry had no idea how one of those even looked in detail, but she was pretty sure the same was true for Derpy. "Big steel drums to store hundreds of litres ... but you just keep pushing . The actual machine is just slowing you down."
The little sprays of milk Derpy had been producing were slowly merging into a continuous stream.
"Just imagine the looks on the ponies in charge of the machine when the metal starts groaning , the barrels bulge and then just rupture , splitting wide open, a flood of milk that just won't stop. Anyone or anything that tries to contain or control you gets overwhelmed."
Berry didn't really see the appeal, but any idiot could see what the idea did to Derpy. She whimpered and squirmed in Berry's lap, but was still holding back for some reason. Berry could see her friend's tits grow tighter and rounder. Her dark nipples throbbed and swelled. Even her areola seemed to bulge out slightly from internal pressure. Derpy grabbed hold of Berry's thighs, probably to keep her hands from her breasts or her snatch.
"T-touch me, Berry. This one's for you." Despite the slight hitch, it was practically an order.
Evidently it was important for Derpy to share with her new experience in some way, so Berry just reached up and gave both of the pegasus' nipples a tweak.
The other mare shrieked, briefly, in pleasure, before using one arm to stick her muzzle into the crook of her elbow to muffle herself. She convulsed as she came and those steady streams of milk, having been interrupted briefly, erupted with greater force.
Berry switched to cupping her partner's breasts. It was interesting to feel the way they slowly changed from so firm that Berry couldn't understand how it hadn't hurt, to growing softer in her hands. She could also feel Derpy's rapid heartbeat through her palms, and the lighter mare's muscles seemed to alternate between locking up and spasming wildly.
"Hey. Gimme a squeeze if you aren't having a seizure."
With the one had she still had on Berry's leg, Derpy responded with a nearly painful tightening of her grip.
"A'ight." Berry was pretty sure a lot of ponies would be better able to appreciate having a mare shaking with pleasure on their lap, squirting milk without an end in sight. Still, she felt very glad to be the pony Derpy wanted.
"Gets better," the pegasus panted. "Redheart had some m-milk." She sighed happily before lowering her voice. "Her boobs got a little bigger. Got milk, too."
"Huh." More new strangeness from Derpy's rack. "Glad that didn't happen to me. She like it?" Berry didn't spend much time considering her appearance and was not dissatisfied with it. Seemed like yet another thing for Derpy to get fired up about, so that was fair enough.
Derpy nodded jerkily. "G-glad it didn't hu-happen to you," she managed to articulate her agreement.
"Hey, those magic tits are still you," Berry assured her. "Wouldn't push anything on anyone they wouldn't be happy with, yeah?" She doubted that the nurse had come out and told Derpy she wanted to be bustier and lactate, so that was mysterious, but the pegasus was a fundamentally decent sort and Berry found it easy to think that it would color whatever else her boobs or milk might be able to do in the future.
She started treating her friend's breasts a little more forcefully, trying to apply pressure from their bases to the nipples. This didn't seem to particularly affect the continuing flow of milk, but Derpy seemed to press her back harder against Berry. "You gotta tell me how you like it."
Derpy moaned. "H-harder than that!" Every movement of Berry's hands on her breasts appeared to make her twitch and shudder.
Hearing and feeling the mare on her lap surrender to pleasure Berry was providing got the earth pony a bit fired up herself. She shifted her hands back to cupping Derpy's breasts from underneath. "Can you tell the difference?"
"Scar on – on your palm. Left."
Berry Punch had been a sufficiently vicious bitch as a teenager that it hadn't been entirely surprising someone would come after her with a knife. The scar was now long faded, but at the time she hadn't gotten proper treatment so the healing process had been less than ideal. She'd told Derpy the story at some point. The mark it had left was still easy to feel out for anyone who knew what to look for, even though all the physical labor she'd done in her life left her hands anything but soft.
She rewarded Derpy with a firm squeeze. "That's how sensitive they are, huh?"
Another shaky nod. "'m close, Berry."
"Good." She slowly shifted her hands to the sides of Derpy's rack and began exerting force to press them together. Only a little at first, escalating as slowly as she was physically capable of. "This is amateur hour. Never done this before. I'll learn, though. Get to know your boobs, your body, figure out how to wring pleasure out of them you can't even imagine right now."
"St-top teasing! Just m-maul them!"
"Shh, I'll get to it." Berry grinned, squeezing harder. "You'll get to know my hands real well. That way, once you're too big to handle, you'll recognize me by touch." She kissed the side of Derpy's neck, then did not pull back before speaking again, her lips and breath brushing across the other mare's skin. "You should learn to read my lips like that. In case I'm dealin' with your jugs out of shouting distance."
Derpy's back arched as she pawed at Berry's hands. She drooled while voicing her lust with inarticulate noises. After several long seconds, tension abruptly left her body. She leaned limply against Berry, drawing huge, gasping breaths while sweating profusely. Slowly, the uncontrolled spray of her milk subsided, leaving a mess of milk on the porch and the yard beyond.
Berry enjoyed her own arousal, because previously she'd had pretty much no luck with fantasies and only managed to feel anything of the sort during infrequent equipment checks. She'd just never been the randy sort, she'd figured. Feeling that way now seemed to be a good sign regarding her feelings for Derpy. "You alright with trying to make that real?" She finally took her hands off her friend.
"Yeah ... sounds wonderful. I want to share my milk ... and I want to be huge . But you're special to me. Even once everyone knows my boobs, there needs to be something special just between us." Derpy spoke languidly, sporting a lazy smile.
"Looking forward to it," Berry nodded, wrapping her arms around Derpy's stomach. "The whole exercise did get me a little hot under the collar, actually."
Derpy tensed momentarily, then produced a gusty sigh. "I get that this is actually a big deal for you." She paused. "A little hot? Tonight blows anything anyone else did for me out of the sky, no contest. How am I ever gonna make this up to you?"
"C'mon Derps, you don't owe me anything." Berry snorted. "We're only getting started, and I don't want you to lose sleep over doing right by me. I'm really getting a lot out of bein' the one you're allowing to handle you like that." She shrugged. "Do ya need to bring me off to stop worrying that you can't do anything for me?"
The pegasus stood abruptly, swaying briefly, then taking a staggering step past the mess on the ground. "Yes! Stay right there! Actually maybe scoot over a bit." She gestured to the other end of the bench.
Seeing Derpy's more forceful side was fun in Berry's mind. She nodded and re positioned herself accordingly while the pegasus ran inside. It gave Berry a few minutes of idle time.
She was surprised at what she'd felt. Was still feeling, really. Anticipation for whatever Derpy was going to do, sure. She felt excited in more ways than one. Maybe the emotional bond of their relationship enabled that sort of thing, because Berry had never lusted after anyone in her life. She'd masturbated only irregularly to release a vague sort of tension but she'd never thought of that sort of thing as desire, because she'd never much liked other ponies.
Derpy returned wearing nothing but her panties, still soaked through, clinging to her labia. She had a blanket draped over herself, one wadded up under her arm and a glass of milk in the other hand.
"Derps, I hope our kids trust us enough to talk to us when they're going through puberty and after. I shouldn't be surprised at myself at my age, yeah?"
That stopped the other mare short. "Uh, yeah. Obviously." Derpy tilted her head. "'course the girls would trust you to talk about any worries. Little early to be thinking about that, though."
And poorly timed, she'd probably wanted to add. "Fair. So, what's the plan now?"
Before responding, Derpy made her wait while she drank the whole glass of milk. "You're gonna take your pants off, and I'm gonna hide under this blanket and eat you out." She cast a look towards the scraggly hedge. "The whole world ought to see my boobs, but your goods are only for me."
"I ... yeah, I like the idea." Berry started the process of getting out of her pants with as little actual getting up as possible.
Derpy smiled fondly. "Look, I get it, you're as excitable as a block of granite, and I've got nearly no relevant previous experience in this case anyway, so I'm not gonna take it personally if this turns out to just be alright for you. I want to do something for you. Just because we're not living together for the sex doesn't mean I can't do my best for you on that front."
"Appreciate it." Berry had to admit that it was definitely hot to see Derpy standing there, wearing next to nothing. Her tits would look big even on Berry, on Derpy's slighter frame they were huge. They were absolutely of a size were a mare ought to wear a bra, yet Derpy absolutely didn't need one. Her breasts effortlessly held a very attractive shape, appearing weighty but not sagging, which cleary had to be another aspect of her magic boobs. Her nipples still stood erect. A bit of extra weight was still stubbornly sticking around her body, but that seemed more like a bonus. Berry wasn' dumb enough to point out that Derpy had been in better shape before having the kid, but it was something to work on, make sure the mare's fitness kept up with the boobs she wanted to grow.
The pegasus assumed a kneeling position, using the second blanket as a cushion, the other one draped over her like a cloak. "Ready?"
"Not uncomfortable down there?" Berry spread her legs.
"Don't worry about it." Derpy grinned up at her. "Ten years from now I'll be leaning on my boobs for this."
There was no time to respond before Derpy set to work, leaning in and placing a playful kiss on Berry's lower lips before teasing the tip of her tongue along the edges.
Berry's body responded as anticipated to the stimulation. The warm and wet tongue was a new experience, but felt great. The other mare's breath was another factor. Not that Ruby Pinch's sire had been a bad lay or anything, but Berry couldn't remember ever feeling quite so happy during sex or masturbation.
She suspected that her feelings for Derpy made all the difference. "Doin' good, Derps."
"Mmh." Derpy's breathing quickened. She pulled back briefly, apparently just to allow Berry to see that her milk was flowing again. With a smirk, she leaned in again and continued probing Berry's depths.
Although Berry had previously assumed that she just wasn't the sort to get aroused by other ponies, she had to admit to herself that the situation was, in fact, pretty hot. She wasn't even really used to thinking of Derpy as her lover yet, but still. The other mare kneeled in front of her, her large breasts presumably hanging heavily off her chest, spraying milk while she pleasured Berry.
She reached under the covering blanket, which in all honestly probably wouldn't fool most ponies, and placed her hands on the pegasus' back, rubbing around the bases of her wings. While she wasn't sure what the best move in her position was, going for the wings made sense in a fight, so they might react well to a more careful touch. Berry hummed, feeling herself smiling. She figured she should return the favor eventually, if Derpy was interested. The mare had been very much focused on her boobs and also directed Berry's attention to them.
Berry experienced a pleasant shiver as she climaxed. It had taken quite a bit more doing compared to the ease with which she could get Derpy off. Some part of it might have been inexperience on Derpy's part, but it was hard to get Berry's blood up in any situation. She sighed. At least her therapist was reasonably sure that whatever was up with her subdued enthusiasm regarding sex was probably her own normal and not yet another thing to blame on her childhood.
Derpy stood up, wiping her mouth with the back of her arm, looking happy. "Good?"
"Yeah." Berry nodded, eyeing the floor. Milk had spread to soak into the wadded up blanket Derpy had knelt on. It'd also connected to the previous mess. She was still making plans to fix up the house to be easier to clean up, but mentioning that now would just get Derpy going again. She stood up, seeing as they had to clean up the porch. "Was good." She hesitated. "Still ... I don't care too much? I'd miss your hugs more. I'm touch-starved that way. Hell, I like touching you."
"Even if I'm turning into a horny mess, I won't forget that you're in it for the emotional connection," Derpy promised with a reassuring smile. Milk had trailed down the lower slopes of her breasts and the front of her body. She wrapped herself up in the blanket she'd used for cover to avoid getting any on Berry before hugging the taller pony.
"Never doubted it," Berry shrugged. "Let's clean up." It was apparent to her that the close emotional bond was the reason that she had actually looked forward and enjoyed the sexual encounter. Maybe she would have been more experienced if she didn't find it so difficult to connect to ponies. Coming to care about Derpy hadn't exactly been a whirlwind romance.
"Hm." Derpy reacted with another smug smile. "Sure is a shame, the way my boobs make all this extra work."
"Heh." She saw nothing wrong with the way Derpy seemed to practically relish making a mess with her milk. Better than getting stressed about it. "Speaking of work, next time I put up a stall on market day, you should come along, put up a sign that you're selling milk. Might not get customers, but you ought to plant the notion in their heads and give it time to, y'know, germinate."
The kind of weirdo who'd jump at buying a pony's milk probably wouldn't do it in public, but Berry had caught on to the fact that Derpy wanted her milk to have mass appeal.
Derpy smiled widely. "That's brilliant!"
"We'll make a day of it. With the kids along, we're sure to get folks stopping by, they're a cute age, yeah?" Berry went to retrieve some a bucket of water to dump on the puddle of milk. Washing it out into the grass was an appealingly lazy solution.
"We'd need some kind of screen or curtain so I can make a show of milking myself without going all in on public indecency," Derpy mused, sounding slightly morose about not getting to flaunt naked tits in front of the whole market.
They spent the rest of a lazy evening discussing ways to desensitize the town to Derpy's lactation and exhibitionism.
