Donating Milk

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.