Making A New Sibling

Night One

“Hooooo boy… Okay, settle down, settle down…”

Shining Armor had his eyes closed as he took a couple preparatory breaths, needing a moment after taking a glance out the window. He had tried his best to occupy his time and remain busy for most of the day, but the Prince still found himself waiting like an antsy child. He had no idea how badly his heart was racing until he caught a glimpse of the stallion from his high vantage point. Shining nearly stumbled down the stairs while struggling to maintain a casual pace, not wanting to appear too hasty to any of his Guards or staff.

“Whooooo…” He let out a long, calming exhale while trotting down the lengthy stairs, which was thankfully unseen by any of the Crystal Ponies. There may have been a slight blush on Shining Armor’s cheeks, but that wasn’t too suspicious considering the expected guest. Even though it was fairly late in the day, almost close to evening, a couple of Shining’s personal Guards have just returned from the train station with his esteemed guest by their side. And just as he reached the bottom steps, Shining was smiling wide when he saw the main doors opening before him. “A-Alright then…”

Both Crystal Guards kept stern looks on their faces, but greeted their Prince with respectful bows when they entered the castle. Between them was an older unicorn stallion, whose blue coat and darker blue mane definitely shared similar hues to the pony before him. Shining smiled and rushed in, not giving the stallion a moment to speak before pulling him in for a tight hug. Neither of the Guards interfered, and just smiled happily when the older pony hugged Shining back.

“Ahhh, there’s my Highness! Heh heh~” Night Light, otherwise known as one of the “Royal Grandparents” to Princess Flurry Heart and the Patriarch of the Twilight family, was more than happy to give his Royal son a loving hug. Shining squeezed his Dad tight, ignoring his thoughts well enough to appreciate this moment as a genuine familial bond. After the two pulled back, Night smirked at his son and asked, “So, is Cadance doing well? I was kinda hoping to be greeted by her too~”

Shining sighed and rolled his eyes, still keeping a chipper smile when he replied, “Well, that was supposed to be the plan, but Flurry Heart kinda needed an ‘emergency cleanup,’ if you catch my drift.”

“Aaaaahhhh, gotcha.” Night Light gave a sympathetic shrug of his own. “Yeah, that sounds about right. I’ve lost count of how many times you or Twilight had to make us improvise or change our schedules a bit…” As he reminisced, the stallion chuckled and shook his head with a smile. “Aaahhhh… Hard to believe how much Velvet and I would end up missing those things.”

“Well, that’s why we’re here, right?” After giving his Dad a loving nudge, he motioned back to his Guards so they could be dismissed. The Crystal Ponies bowed politely and made their leave, allowing the Prince to have some proper time with his Father. Shining led his Dad back towards the stairs, and they trotted up side-by-side without any interruption.

“So, I take it that Mom didn’t want to make the train ride?”

Night Light scoffed a little before shooting his son a look. “What, were you wanting her to come up for this?”

He caught the cheeky tone in his Dad’s voice, indicating what he should’ve already known before asking. That caused Shining to quickly wince and avert his eyes. “Uhhh… No, not really…”

“Hmph~ Honestly, I’m glad you said that.” Night Light gave another chuckle to himself when he caught his son’s embarrassed blush. “I mean, given what we have planned, it’d be really awkward if you did--”

“Yeah, I get that, Dad! Ugh…” Shining cringed a little and tried not to bite his lip. After a brief exhale through his nostrils, he looked back at him to clarify, “So, like… is she still cool about all of this?”

“Pbbt!” Night Light raised a brow. “You think I’d be here if she didn’t? This was all her idea, after all.”

“Yeah, but that was two weeks ago…” As they reached the top of the stairs, Shining looked around to make sure nopony was eavesdropping. Despite how isolated the two appeared in such a spacious ballroom, Shining made sure to lean in and speak in a more hushed tone. “And uhhh… I just wanted to make sure before enacting any spells first, y’know?”

“Oh, you haven’t done that yet?” Night Light seemed much less nervous than his son, and just smirked while keeping a casual tone of voice. “Well, hopefully they don’t need much of a waiting time before they’re confirmed effective. We only have this weekend, remember?”

“Oh, d-don’t worry! She already talked with Twily to make sure they worked properly…” As soon as he mentioned his sister’s name, Shining shuddered a little with a more uncomfortable look. “Ugh, that was an awkward talk when she visited…”

“Oh, don’t tell me you bought up the plans with her.” Night Light paused at the top of the steps to stare at his son. “How much did you actually say?”

“Don’t worry, Cadance was careful not to say too much. Although uhhh…” Shining’s face cringed a bit when he paused briefly. “... I’ll admit Twilight looked very happy when they finished talking, so I can only assume she knows Cadance’s part in all this.”

“Well, technically speaking, everypony will know that part soon enough…” Night Light followed his son as they walked towards a large, metallic elevator at the end of the hall. Two Guards were posted at the entrance, since it was meant for Royals and esteemed guests only (as well as any differently-abled individuals). Of course, the two just nodded when Night Light entered the elevator with Shining, not saying a word. The stallions remained silent until the doors were closed, and the elevator began to make its ascent to the higher floors. With the motors whirring above them, Night Light was able to lean in with a smirk and whisper into Shining’s ear, “What’s really important is that they don’t connect her with me~”

Shining Armor closed his eyes with a long, knowing sigh that came out as more of a whinny. Night Light chuckled when he pulled his head back, able to see how deeply his son’s blush became with that remark. After a couple seconds, Shining merely rolled his eyes and nodded begrudgingly. “Yeah… Yeah, I understand that point very well, Dad…”

Night Light took that moment to lean in and give Shining a supportive nuzzle from the side. That was enough to get Shining to smile a little, but it was clear that he was trying not to feel too flustered. When the elevator finally stopped, there were no Guards to greet the two on the private floor. All that was in front of them was the short, but lavish hallway which led straight to Shining and Cadance's private quarters.

Shining exited the elevator first, with Night Light following and looking around. “So, didn’t this used to be Sombra’s bedroom?”

“Ehh, more of a harem than anything else. It took us months to get the smell out during renovations.” Shining looked back at his Dad with a smirk and added, “Don’t worry though. The bed itself is not Sombra’s. The one that was here kinda… broke when we first moved in~”

“Oh, it broke?” Night Light tilted his head with a smirk of his own. “Heh~ Should I ask how it broke?”

“Well that depends: Do you want to hear about your son’s exploits?~” Shining was standing at the doorway by that point, and paused to give his Father a coy grin and a perk of his brows. It was obvious that Shining wanted to try and fluster him a little, but Night didn’t appear too perturbed. In fact, all that the older stallion did was huff and shrug his head playfully.

“Well, considering what we have planned for this weekend…” Before Shining Armor could turn the doorknob, a yellow aura of magic wrapped around it to keep the door shut. Shining glanced back at his Dad, who walked up closer behind his son with a more determined grin. He narrowed his eyes on Shining, and leaned in close to catch him off-guard. “Yes, Shining Armor. I do want to know~”

Shining reeled his head back a little, and grew wide-eyed in response to his Dad’s direct stare. The younger stallion couldn’t help gulping nervously, while his eyes darted back and forth a couple times. “Uhhh… heh heh heh… G-Good one, Dad…”

Night Light leaned back on his hind-legs, which allowed him to stand bipedally and tower over his son. He reached out with a foreleg to brace himself against the wall, and kept a devious smirk while looking down at Shining. The Prince blushed even more profusely, not expecting his Father to get in this close. The scent of his sweat was lingering faintly through his fur, which made Shining purse his lips and nearly tremble. “Mmmm… Uuhhhh…W-What are you--”

The doorknob clicked audibly, interrupting the two when they turned their heads. It seemed that the bedroom was already occupied, and was just unlocked by whomever was inside. Shining and Night looked back at each other for a moment, with the latter sighing and stepping back on all fours. Shining needed a second to breathe out, but he was still blushing hard by the time he turned around. “W-Well, uhhh… Seems like she’s already here! Heh heh…”

Shining opened the door, and smiled when he saw a familiar face waiting by the bed. Princess Cadance was lying on her side at the edge of the mattress, and made sure to remain in that position when the two stallions entered. Her smile widened upon seeing the two, and she lit up her horn so the door could be shut behind them. “Hello there, Shining Armor… Night Light~”

With the way she was staring at both stallions with such a sultry look, Night Light ended up blushing just as deeply as his son. The two dorkily averted their eyes and chuckled meekly, which was enough to make Cadance giggle with a hoof over her mouth. “Ohmigosh, you two look SO alike! It’s adorable~”

“C-Cadance, come on…” Shining tried to wave his hoof in dismissal, but he appeared much too sheepish to keep his wife from giggling. Night Light looked equally as flustered, but he was able to shrug his shoulders before speaking up.

“Well, hopefully that won’t make things too weird for either of you…” He looked back at Cadance with a more subdued smile, and lowered his head while blushing. “And ummm… Velvet and I are really, really thankful for you agreeing to this.”

“Well, of course I would be!” Cadance pulled herself out of bed, and walked right up to Night Light to give him a friendly hug. “And please don’t act all worried or embarrassed for my sake, alright? Shining and I already talked it all out, and we have no issues with doing this for you two.”

Night Light hugged her back, and was smiling graciously when they pulled apart. Cadance took that moment to lean back in and kiss Night Light on the cheek, which made him blush even deeper. Shining was blushing a bit too, and he had to look away while readjusting his hooves. Of course, his head perked up when he heard Cadance ask, “Isn’t that right, honey?”

“Oh! Uhhh… Y-Yeah, totally…” Despite his chipper response, Shining still looked nervous when he looked back at his Father and wife. Seeing the two side-by-side, the realization was enough to make Shining’s muzzle skew worriedly. Nevertheless, he quickly breathed out and tried to smile more naturally. “Heh~ Sorry, uhhh… this is still a lot to process.”

“Hey, how do you think I feel?” Night Light tried not to scoff while looking between the two ponies. “I mean, this is technically my first time too. At least, with somepony other than Velvet…”

Shining couldn’t exactly refute that point, and merely nodded with his muzzle shut. Despite how weird this was for everypony involved, he knew that Night Light was likely more hesitant than either of them. Shining thought it over for a bit, and decided to ask, “So, did you or Mom talk about rules or anything? Like, I don’t want to break any boundaries or anything.”

“Hmph~ I think we’re already doing that, hon…” Cadance said that with a rather sly smirk, as well as a perk of her brows. Shining sighed and scratched the back of his mane, while Night Light looked away from her with a bashful smile of his own. The Princess made sure to add, “However, Shining does make a good point. Did Velvet mention anything that could be a ‘Hard-No’ for this weekend?”

“Actually, no.” He looked back at her with a surprised smile and shook his head. “In fact, she straight-up told me to do whatever it takes to make it happen. So, uhhhh… yeah~”

He smiled rather nervously, and tried not to look back at his son to see his reaction. The Prince winced a little from that revelation, but he could only shrug his head in silence. Meanwhile, Cadance responded with a chuckle of her own. “Well, I suppose that makes sense. If she’s not able to have foals anymore, I can’t blame her for wanting the best chances~”

“Well, I’m really grateful to hear that. Ummm…” Night Light paused and looked at both ponies with slight apprehension. After taking a deep breath, he decided to ask, “So, uhhh… How about you two? Do either of you have any… ‘Hard-Nos’ to bring up?”

Cadance and Shining glanced at one another, but didn’t say anything. Instead, the two gave each other a knowing look, with the Princess giving a nonchalant shrug of her shoulders. While she smirked faintly, her husband blushed a little and eventually breathed out. “Uhhh… I-I don’t think we do,” he couldn’t look back at his Dad while giving that answer, but he made sure Cadance could see the affirmative shake of his head. “Did… you have any, honey?”

“Nope!” Cadance was beaming proudly, and made sure to look back at Night Light to add, “As a Mother myself, I completely understand the importance of you and Velvet wanting another foal. And since you two made it very clear that artificial insemination is out of the question…”

She glanced back at Shining for a second, and saw him give a small nod in approval. She grinned much more confidently, and turned back to Night to add, “As your Daughter-In-law, I’m willing to do whatever it takes to be a surrogate for you and Velvet~”

To prove her point, the Princess of Love leaned in without warning and grabbed hold of the stallion’s head. Shining went wide-eyed in an instant, and could only watch as his wife planted her lips on Night Light’s. Cadance pulled her Father-In-Law in close, and held in place as they shared a deep kiss. Night was more wide-eyed than Shining for a couple seconds, but his nervous jitters went away when he closed his eyes to reciprocate the gesture. “Mmmmmmm…”

Night Light was trembling a little as he tried to stand upright, but that was easier said than done when he knew his own son was watching him. Regardless of the Prince’s unblinking stare on them, Night tried to appreciate the soft, supple lips of Cadance’s connected to his own. He tried not to open his muzzle too wide, but he still felt the smallest grace of Cadance’s tongue against his lips. When the two finally pulled their muzzles back, the stallion shuddered with his eyes clenched shut. “Nnnnghhh! H-Holy…”

He had to step back from the Princess briefly, and took a couple breaths to settle his nerves. Cadance took that moment to look back at Shining, who looked rather frazzled from seeing that adulterous moment. But much like his Dad, Shining’s face was beet-red while averting his eyes from her. “Heh… W-Wow, uhhhh… That was unexpected~”

“Well, you agreed to it…” Cadance smirked much more confidently than either of the stallions before her. She knew that this arrangement would probably be more awkward for the father and son, but she’d be lying if she said she wasn’t curious to continue. She waited a moment before asking her In-Law, “Are you okay, Night Light? I hope that wasn’t too much.”

“N-No, no… I’m good…” Night Light took another breath to get fully settled, and he huffed while smiling back at her. “Well! Ummm… I guess that’s one way to break the tension~”

“Well, at least now we can move forward and make this work…” Cadance turned back towards her husband. “Honey? You have those spells practiced?”

“Y… Y-Yeah, I do…” Shining sighed with a shake of his head, and then stepped forward to continue with this arrangement. Before he could light up his horn, he muttered to himself, “That was a very awkward conversation with Twilight…”

He first went up to Cadance, and gave her one final kiss on the lips before illuminating his horn. Night Light stepped back a few steps, and watched as his son closed his eyes and lowered his head. Cadance took a step back as well, and held her breath as she stood with her eyes closed in preparation. Shining’s magenta-hued magic circled around his wife like a sphere, completely encasing her within the bubble for a second or two. However, that magic then quickly pulled inward on all sides, encasing around the Princess and disappearing through her fur. The last of the glowing magic could be seen just beneath her tail, before a sudden zap hit her nethers and made her gasp in shock.

“OOHHH!!~” She collapsed onto her knees, and still had her eyes shut while quivering on the floor. Both stallions rushed in and helped her up, but Cadance’s knees were buckling hard as she struggled to stand upright. When she finally got back on all-fours, her hind-legs were spread apart with a wider gait with her thighs twitching in tension. Shining reeled back in surprise when he noticed a couple of fresh droplets trickling down the back of her legs, almost like she wet herself. Meanwhile, the Princess had to bite her lip while groaning under her breath. “NnnnNNNnnnfffffff~”

“Well, uhhhh…” He wasn’t sure how to feel about that spell working so quickly, but he was grateful he waited until after his Dad arrived to try it out. Cadance had to lean against the wall while fanning her face with a hoof. With a flustered huff, Shining tried to smirk playfully and say, “I think that ovulation spell worked~”

“Yeah, I can tell…” Night Light was struggling not to snicker while standing to the side. “I can smell her from here~”

“Aaaahhhh!!~” Cadance pushed back harder against the wall, even going as far as to turn around so her back could brace up against it. She stood on her hind-legs, which were still outstretched and quivering, while her wings sprung out with several antsy twitches. She used one of her forelegs to bite down on her hoof, not expecting the heat to hit her so brutally in an instant. With her other foreleg, Cadance reached down so she could cover her leaking marehood from view in such an exposing position.

“Wow…” Night Light huffed with a blushed smile, and watched his Daughter-In-Law becoming increasingly horny by the second. He had to keep himself from feeling too guilty, since he knew this was one of the only times he could get away with leering at his son’s wife. It helped when he glanced back at Shining for a second, only to see him give a light smile and a shrug of his head.

“Heh… Not bad, huh?~” Shining tried not to feel too weird about speaking about Cadance like that to somepony else, especially his own Dad. Meanwhile, the Princess herself was too lost in her own building heat to register the two stallions in that moment. She leaned her head back with her teeth gritted, and groaned while rubbing her hoof tighter between her legs. Night Light was too busy staring at the mare, and ended up blurting a response after shaking his head clear.

“O-Oh! Y-Yeah… You… Y-You’re a lucky stallion~” Night Light looked back at him for a moment, before rolling his eyes and jokingly adding, “Well, maybe not as lucky as me this weekend. Heh heh…”

That point was enough to make Shining sigh with a more uneasy look, which made Night quickly backtrack. “Oh, sorry! I wasn’t trying to make it weird, I jus--”

“No, it’s okay. I’m fine…” Shining needed a second to breathe out, but he kept a genuine smile for his Dad to see. “We already talked this all out, and… I-If you’re still wanting to continue, then… so do I~”

Night Light looked back at Cadance, who was panting through her nostrils and rubbing her marehood more vigorously. The smell of her arousal was lingering stronger in the air, causing both stallions to grunt at the same time. Shining quickly walked away from both of them, and went towards the nightstand by the bed to retrieve something. “Also, ummm… Cadance felt like this might make things less awkward if I…”

Shining had his muzzle skewed nervously when he turned around, and held a small metallic device in his hoof. Night Light’s brows raised the instant he recognized the petite, phallic-shaped item made of polished metal bars. “Oh!” He blushed even harder in realization, and stared back at his son more baffled. “Wait, is… is that for you?”

“Well, ummm… k-kinda yeah…” Shining felt uncomfortable helding the chastity cage in front of his Dad, but he motioned back towards Cadance to clarify, “She, uhhh… she was worried it might be uncomfortable for you to, ummm… like… seeing me hard.”

Night Light scoffed with an amused smirk, and his eyes veered downward for a second. Shining tried to push his hind-legs closer together, but his semi-flaccid member could be seen clear as day regardless. While it may have been a bizarre addition for this weekend, Night Light couldn’t exactly dismiss Cadance’s reason for it. He lit up his horn, and picked up the cage with his magic so he could inspect the device himself. “Hmmmm… Have you ever used a product like this before?”

“Ummmm…” Shining lowered his head in embarrassment, but didn’t try to conceal the weak nod he gave. “... a few times this week… Mostly for practice.”

“Hmph, practice?~” With a more cocky smirk, Night tossed the chastity cage back to him. Shining caught it in his hoof before hearing his Dad say, “Well, what would be really uncomfortable is putting that on you myself, so…”

Night Light gave him a sly, expectant stare that made Shining shiver and bite his lip. Without saying much, Shining just nodded begrudgingly and trotted back to the bed. Cadance’s hungry moans were becoming harder to ignore, which helped Shining to get his chastity cage on at a faster pace. Even though he was fairly hard already, his nimble hooves (as well as a convenient cooling spell for his junk) were able to slip the device over his penis without much issue. He still grunted a little when he used the tiny key to click the lock shut. “Nnnnghhhh…”

When Shining Armor sat back upright, Night Light could see how much his son’s cock was bulging within the thin bars of the cage. Since the device was curved downward, there was no way for Shining to get fully erect without massive discomfort. And in a matter of seconds, Shining was already gritting his teeth as he clenched his eyes and grunted from the building pressure. “Mmmfff…”

“AAAAHHHH!!~” Cadance had managed to reopen her eyes just enough to witness Shining slipping the cage on, which just made her even more riled-up and eager for action. Her stifled groans were enough to catch both stallions’ attention, and they looked back at her while she was mercilessly rubbing her clit. Even though she was panting heavily, she managed to speak up in heated gasps. “Mmmmffff… Shi… Shining, give… Give him the key, nnnnfffffff!!~”

Night Light glanced back at his son all wide-eyed, while the Prince just hung his head for a second. “Ughhhh…” Shining finally hopped off the bed, taking a second to adjust to his new “equipment,” before waddling back towards his Dad. He sighed reluctantly before reaching out with the key in his hoof. “She, ummm… she also wanted this to happen…”

Night Light blinked in surprise, but didn’t object when he took the key from Shining’s hoof. With Cadance still groaning and rubbing herself, the older stallion only needed a second before nodding with a smirk. “Ahhh, I see… Well, if that’s what she wants, I expect that lock to stay in place until she gets a Positive pregnancy result~”

Shining bit his lip, his expression almost looking like a remorseful cringe of sorts. But before Night Light could think to give another apology, he noticed how badly his son’s hind-legs tensed up from his statement. It was obvious that Shining needed the cage, since he would’ve gotten rock-hard in front of his own Father without it. In addition, Shining breathed out shakily before looking up at him and giving a meager nod. “Ummm… I-I… I understand…”

“Wonderful~” Night Light got confident enough to pull Shining in with a hoof, and planted a kiss on his forehead. Shining reeled back a little with a blush, but he kept a flustered smile that his Dad could see. Now with his member tightly packed in his cage, all he could do was try to place his utmost focus on the stallion in front of him. Because of that, Shining Armor took a breath before stepping back and lighting up his horn.

“A-Alright, ummm… Just stay still for a second…” Shining lowered his head so his horn was pointed at Night Light, and he shot out another surge of his magenta magic. Much like the enchantment he provided for Cadance, Shining’s aura wrapped around the entirety of Night’s body like a glowing translucent bubble. And in a matter of seconds, the magic was absorbed into the stallion’s body, dissipating entirely when it settled right between his hind-legs. Shining kept his eyes closed, but he winced when he overheard his Dad’s brief groan upon completing the spell. “Ahhhh… T-There you go…”

“NnnnNNNnnfffff…” Night Light stumbled back a couple steps, but was soon blushing as profusely as Cadance was. The Princess was still struggling to remain upright, but her hooves were starting to skid beneath her weight as she kept leaning back with a hoof against her pussy. Night Light’s face appeared strained for a moment, but he let out a sharp exhale before shuddering and biting his lip. “Ooooohhhhhh… Herrrreeeee we go…”

Beneath the older stallion’s barrel, his thick cockhead was already slipping out from his sheath. The plump, meaty stallionhood quickly sprung out from between Night Light’s legs, growing erect in a matter of seconds. Shining couldn’t help looking right at the girthy beast, which made him go wide-eyed in an instant. The younger stallion went slack-jawed when he witnessed Night’s cock springing out in full mast, growing to a length notably larger than expected. More specifically, Shining wouldn’t have guessed that his Dad had a few extra inches compared to his own…

“Aaaaahhhhhh~” Night Light sighed with a wider, more relieved smile as he settled with the new enchantment. He looked down to sneak a peek between his legs, and grinned at the sight of his stallionhood throbbing at its full length. All thirteen inches of Night’s magnificent girth were glistening after being unsheathed, with the thick veins protruding from the shaft and pulsating with every throb. It was enough to not only leave his own son slack-jawed in envy, but to also make Princess Cadance stop moaning for a moment.

“Ooohhh…” Cadance reopened her eyes long enough to see what Night Light was packing, and she gasped to herself silently. She was frozen against the wall with her wings still twitching, while her hoof continued to squeeze against her nethers so her arousal was trickling down her legs. She bit her lip with an antsy groan, and narrowed her eyes on him with a hungry stare. “Oh, w-wow… Mister Light, where has that been?~”

“Hmph…” Night Light shivered when he glanced back at her. His grin widened quite a bit, but his limbs were trembling as he felt those surges of heat coursing through him like waves. Shining Armor’s eyes darted back and forth as he looked between them, catching how intensely the two were staring at one another. It was like being caught in an open field right before being struck by lightning, with the electricity lingering in the air and leaving everything in tight, silent tension…

And whether he liked it or not, Shining Armor felt a distinct tension inside of his chastity cage too.

“Nnnnfffff!~” Night Light turned around to face Cadance, but looked down at his erection with an impressed whistle. “Whoo! Shining, you certainly got me feeling more energized~ Nnnffff…”

“Y-Yeah, uhhhh… the spell should make you more, uhhh… f-fertile and stuff…” Shining felt embarrassed specifying that detail for his Dad, and he had to avert his eyes from both ponies leering at one another so blatantly. “I-It uhhhh… The s-spell should last for as long as you stay erect, so… You might need to try and stay hard if you can between ummm… a-attempts…”

While the Prince cringed from the plural wording, which wasn’t helped when he overheard both ponies snickering. Night Light was growing more confident with himself, and even reached down with a hoof to test his new virility.

“Oooohhhhh…” He groaned as he gave his throbbing cock a couple testing strokes; he tried to slide his hoof gently, but the sensitivity from Shining’s spell caused his knees to quake. A couple thick droplets of precum smeared across his hoof before he pulled his foreleg back, leaving the fetlocks matted in a clear sheen. Meanwhile, his thick cock was twitching especially hard beneath him, and smacked the underside of his barrel with a couple meaty slaps. “J-Jeeze… S-So I… I need to stay erect the whole weekend?

“Mnnghhh, you better~”

Cadance’s voice caught both of the stallions’ attention, as she quickly pushed herself off the wall by her wings. She landed back on her hooves with a forceful lunge, landing in place like she had just soared down from the skies above. With her legs spread apart, and her marehood winking readily beneath her raised tail, her intense stare on Night Light was enough to make Shining gulp. But for the stallion across from her, that stance just made his cock throb in need. She walked up to the stallion, and wrapped a hoof around the back of his head. “And if you need any help maintaining such a thing, I’m sure that our Prince can abide as much as he can~”

Both Night Light and Shining Armor got all wide-eyed, and looked back at each other with matching blushes. Meanwhile, Cadance just smirked back at her husband and clarified, “And just for the record, you already tended to his arousal just now, so there should be no issue with you continuing as such for the weekend… Right?~”

Shining opened his mouth slightly, but nothing could come out as he blinked in silence. When he looked back at his Dad, the only response Night Light gave was a contemplative roll of his eyes. His muzzle was slightly skewed, but it seemed that his newfound horniness was forcing him to consider such a taboo option in that moment. Shining looked back at his wife in shock, but she was grinning back at him with obvious intent.

“You know…” She leaned in close to Shining, and whispered into his ear, “If you agree to do it, I’ll do whatever you want when you get out of that cage~”

He was practically bug-eyed when he stared back at the grinning Princess. He tried to look back at his father, but Night Light was too busy glancing back at Cadance’s ass with a lick of his lips. Shining’s blush deepened when he turned back to her and asked, “S-So, like… you really want me to--”

“Yes~” Cadance placed her hoof over his mouth, keeping him from saying anything more. “I really want you to do that. With him~”

Shining Armor turned his head away for a second, only to accidentally point his muzzle straight at his Dad’s twitching cock. A shuddering whinny came out as he shivered in place, while his chastity cage tensed up more notably. “Nnnnghhhh… F… F-Fuck, okay… okayI’lldoit…”

“Yay!~” She planted a deep kiss on Shining's lips, and then pulled back with a wet pop that left Shining gasping for air. Before leaving him to tend to his Dad, she made sure to whisper sultrily into his ear, “In that case, you better listen to what I tell him next…”

Princess Cadance made sure that Night Light was still gawking at her backside, and she walked over towards the bed with her tail still raised. She laid the front half of her body across the plush bedding, while her hind-legs remained on the floor with her ass fully presented. She turned her head to look back at both stallions, who were awestruck by the Alicorn’s pristine pussy on full display. After reaching back with both of her hooves, she gripped both of her cheeks tightly as she spoke in a lustful purr:

“Mmmmmm… Come on, Night Light… Shining won’t be touching any of this until you knock me up~”

Night Light exhaled through his nostrils in an antsy whinny, and he couldn’t help pushing his son aside. Shining nearly stumbled to the floor as his Dad barrelled past him, making a beeline straight towards the Princess and her waiting snatch. Before Shining could think to say anything, he caught sight of his wife’s enamored stare pointed right at him.

“And if you need any help between our sessions…” Cadance glanced right back at her Father-In-Law, and shuddered when she added, “Nnnffffff… T-Then Shining will gladly help you out like a good col--AAAHHHH!!!~”

Night Light didn’t wait for Cadance to finish her giddy remark, which almost made Shining Armor sigh in relief. Unfortunately, the Prince was still frozen with a stunned look when he saw how quickly his Dad mounted her. Due to how pent-up both ponies were, neither of them wanted to bother with foreplay or setting the mood. Instead, the stallion’s thick cockhead pressed right up against that leaking marehood, prompting Cadance to tense up and shiver through her uncontrollable moan. “OoooOOOOOHHHHH!!! Nnnnnghhhhhh…”

Shining Armor had to take a moment to look around the bedroom, just to make sure he was truly the only one present for this level of debauchery; he may have double-checked that he locked the doors and windows, but there was always a chance Discord could be watching from somewhere with a video camera and a bowl of popcorn. Luckily, the Prince was still the sole audience member present when Night Light and Cadance began their little show. As soon as Shining turned back around, he was greeted with the sound of his wife’s boisterous moan.

“AAAHHHHH!!!~” Her head reeled back, and her wings sprung out with feathers flying when she felt that first push from Night Light’s hips. The stallion clenched his eyes shut and gritted his teeth, groaning hard as he felt that supple warmth against his cockhead. His lengthy shaft could be seen clear as day from Shining Armor’s point of view, and the Prince’s muzzle went agape when he saw it visibly throbbing against his wife. With how tightly Night was pressing up against her entrance, as well as his magically enhanced arousal, Shining could only imagine that his Dad was pumping fresh strands of precum inside of her already. The Princess’ hind-legs were tensing up hard, as was her husband’s stallionhood inside that cage as he watched in blushed silence.

“... h-holy…” Shining had to fan his face with a hoof, but he still felt uncomfortably hot as he watched what his Dad was doing. Night Light continued to push with all his might, fueled by Cadance’s deep moans that were intensifying by the second. Cadance’s voice hiccuped into a high-pitched squeal the moment his flaring head worked its way past her folds. More of her syrupy juices were trickling down his length, and the scent of her arousal was strong enough to make Shining’s nostrils flare out. A weak grunt escaped his muzzle, but it was barely heard over his Dad’s shuddering groan as he kept pushing.

“NNNNGHHHH!!” Night Light kept his eyes shut, and he tried his best to keep himself from unloading into her too soon. Even though the goal was to impregnate the surrogate, he wanted to make sure he guaranteed her a proper load straight into her womb. Inch by inch, his shaft began to disappear between her quivering lips. Cadance gripped the bedsheets with both hooves, and wailed out in primal bliss as she opened up more around his girth.

“MMPHHHH!! Aaaaahhhhh~” Cadance pushed back against Night Light’s cock, which helped her to swallow up a couple more inches. As for her husband, who was still standing beside the bed with his blush ridiculously deep, he didn’t seem to realize he was looming in closer to the two ponies. Even though he was staring right at his Dad’s cock, he looked rather mesmerized by the sheer size of that veiny beast filling her up. And as he got in closer, even placing his front hooves on the mattress to lean in, the additional musk of his Dad’s sweaty cock just made him flare out his nostrils even more.

“Nnnnnffffff…” Shining bit his lip, and he tried to stay silent when he looked up at the two. Night Light continued to slip deeper inside of the mare, and kept his eyes shut so he wouldn’t accidentally see his own child beneath him. Fortunately, even with hearing Cadance’s distinct voice bellowing out in rapture, Night Light remained as hard as a rock while pumping more precum straight into her marehood.

“Aaahhhhh!!~” Cadance gave another enthusiastic push against the older stallion, and managed to get his plump medial ridge inside. Her pussy was gripping him as tightly as a vice, almost like she was trying to milk him for his load already. Shining shivered to himself as he witnessed the penetration up close, feeling surreal about the fact that it wasn’t him delivering that kind of pleasure for her. In addition, his eyes couldn’t stop veering back to stare at the remainder of that throbbing cock mere inches from his snout. Shining didn’t realize his muzzle was still partially open until he was jolted by his wife’s voice. “NnnNNNFFFF!! Oh, fuck!! Nnnnghhhh… G-G-Give it to me, Mister Sparkle!~”

“GnnaaaAAAHHHH!!~” Night Light seemed to take that response quite positively. His hips pounded in with full force, causing Shining to yank his head back before the ponies’ bodies collided. Cadance went wide-eyed with another heavy gasp, not realizing that the bulge of his cockhead was now protruding from the bottom of her stomach. Cadance lurched her head down as she clenched hard around his shaft, squeezing him well enough to make him spasm against her. “Nnnfffff, j-j-jeeze… A-Aren’t you eager~”

“Eager for you, big guy…” Cadance moaned out after taking a deep breath, and she savored every throb of that massive cock stretching her out. She lost count of how many warm, gushing throbs she felt between her legs, undoubtedly already sloshing with Night Lights fresh seed inside. Even though she was able to see her husband from the corner of her eye, she was much more enamored with Night Light while her heat was stirring her nerves. “Aaaahhhh!! Mmmmmm…”

With one final push of his hips, Night Light shuddered with a relieved moan of his own when his hips collided with her backside. Now that he was officially balls-deep, the stallion took a moment to savor the tight, comforting caress of Cadance’s folds hugging every inch. More precum was being pumped out to flood her fertile marehood, with his plump balls visibly pulsating with every throb. While the two held each other tightly in that moment, fully interlocked and shivering in shared embrace, neither of them seemed to notice when Shining moved towards Night Light’s backside…

“Whoa…” Shining Armor didn’t realize he muttered that out loud, but it didn’t stir either of them in the slightest. The Prince was staring right at that plump, muscular ass right in front of him, and trying not to look at the Cutie Marks on both sides. Instead, his eyes narrowed on the hefty pair of dark-blue balls dangling between his legs. The aroma of his musk was particularly ripe, and strong enough to make Shining quiver all over. Even his member tensed up while cramped in his chastity cage, with a pathetic little trickle of precum hanging off the tip.

“NNNGHH!” Shining quickly yanked his head back when Night Light caught him by surprise, pulling his ass back and nearly hitting his son’s snout. Cadance gripped her bedsheets even tighter, and savored the titillating sensation of that flaring head grinding against her walls. Night Light only pulled back enough for his medial ridge to tug against the inside of her opening, while several inches of his thick and veiny shaft could be seen glistening in her arousal. He could hear the Princess take a deep breath, while also feeling his son’s breath particularly close to his backside.

“Oh, Goddess…” As he remained perched behind both the ponies, seeing every curve of that muscular ass pinned between his own wife’s legs, he didn’t try to stop either of them by any means. Night Light was already getting into a rhythm, and he began to thrust into the moaning mare as naturally as he would’ve done for his own spouse. His hips pistoned back and forth, and he got himself into a vigorous pace atop of her. Meanwhile, Cadance’s hooves could be seen curling in tightly, and her wings were fluttering out with strong audibly flaps. With all of that combined, Shining couldn’t help reaching out to grab hold of his Dad’s hips. “Nnnnfffff~”

“Aaahhhh!!~” Night Light perched himself closer against Cadance’s back, and wrapped his forelegs around her torso. His hips kept thrusting back and forth, repeatedly slapping the Princess’ ass while his balls dangled so enticingly. Shining was trying his best to “help” the two, which amounted to just holding his Dad’s hips and feeling how powerfully he was pounding into her. All of it was too much to resist, and the Prince finally gave in to his own impulses.

“OOOHHHHH!!!~”

Night Light couldn’t stop thrusting his hips, even when he felt a sudden enveloping warmth clasping over his balls. Right behind him, his son was gripping his backside with all his might while his eyes were clenched shut. Not only did the Prince lunge in with his muzzle wide-open, but he also managed to wrap his lips around that low-hanging ballsack. The strong, overwhelming taste of sweat and musk hit his tastebuds like a freight-train, and caused his chastity cage to nearly bend from the sheer strain of his own erection. Not even thinking about the fact that it was the same balls that created himself, Shining Armor groaned in shameful pleasure as he held on to Night and sucked on his balls. “Mmmmmphhh!~”

“Gaaahhhh, fuck!!” Night Light couldn’t stop thrusting, and he was too lost in his own arousal to even consider pausing now. Even with the additional pleasures being delivered by his son, Night was throbbing hard inside of Cadance with every thrust he delivered. Cadance couldn’t stop moaning out in pure ecstasy, gripping that shaft as best as she could and ovulating already. She could feel every hot, gushing spurt of his precum shooting inside of her, which made her moan out without a shred of shame or patience.

“AAAAHHHH!! Nnnnfffff… OH, NIGHT LIGHT!!~” She belted out the stallion’s name as passionately as she would’ve done for her own husband. Fortunately, the sound of her boisterous voice not only brought Night Light closer to completion, but also made Shining tense up and suck those balls more eagerly. He burrowed his face in harder against his Dad’s thrusting ass, feeling the slight pulsations of those balls as they churned and began to swell out. Before too long, Shining couldn’t stop drooling as the sheer size filled out both of his cheeks, and left his muzzle partially open while wrapped around the sac. All the while, his ears twitched when he heard his wife cry out, “PLEASE CUM IN ME, DADDY!!!~”

“AAAHHHH!!!~” As soon as he heard that, Night Light spasmed with his face clenched in like he was about to have a stroke. His hips pounded against hers more erratically, which caused his son’s head to be yanked back and forth in tandem with his Dad’s writhing hips. Shining struggled to stay in place, and even went wide-eyed for a moment with some flustered flailing; but with his Dad’s balls now basically trapped inside of his muzzle, the stallion was forced to remain in place until Night was done.

Fortunately for all three ponies caught in that semi-incestuous train, a bellowing cry from the stallion in the middle prompted a quick conclusion.

“GNNNNAAAAAAHHHHHHHH!!!~”

Night Light lunged down and bit down hard on the nape of Cadance’s neck, causing the Princess to shriek out and roll her eyes back. Both of them were at the pure apex of pleasure by that moment, with Shining caught behind them to feel the aftershocks between his lips. His Dad’s swelling balls throbbed particularly hard inside of his stuffed muzzle, allowing Shining to feel the exact moment Night Light shot his first proper load. The Prince’s eyes clenched shut, but his muzzle remained as wide-open as he could while spasming second-hoof to their shared orgasms.

“AAAAHHHH!!!~”
“Nnnnfffffff!!”

Night Light and Princess Cadance remained tightly pinned to one another as he gave that first cumshot, flooding her womb as he shot into her deepest depths. Cadance twitched and writhed uncontrollably under his weight, nearly forgetting about her husband entirely in that brief moment. The thick bulge of Night Light’s head was seen pushing past the Princess’ belly-button, right before her entire stomach bloated out from the sheer volume of his ejaculation. Several thick, magically-enhanced ropes of his cum filled her to the brim with his load, to the point where her belly looked a little pregnant already.

“NNNNNngghhhh… Mmmmphhh~” Night Light’s entire body twitched for a moment while buried so deep inside of his Daughter-In-Law. His voice remained muffled for nearly a minute before finally letting go of her neck, leaving a very visible bite-mark along the side. But for the Princess herself, all she did was continue to moan out weakly between her panted breaths. The two stayed connected for quite a while, savoring that intimate moment of conception with nothing to interrupt the tranquil mood…

-POP!-
“HUUUHHHHH!!!”

… That was, until Shining Armor reminded both ponies of his presence when he yanked his head back, and pried himself off his Dad’s balls with a wet pop.

“GAH!” Night Light winced painfully from that sudden jerk, which actually hurt his balls a little. Luckily, his still-erect cock remained buried inside of Cadance when he turned his head. “Nnnghh, b-be careful back there!”

“Sorry! Ughhh…” Shining had fallen off the bed with that forceful yank, and was now sitting on the floor and rubbing his jaw. “Yeesh…”

“You’re really going to react like that?” Night Light scoffed while keeping a slightly amused smirk. “You know, neither of us told you to do that~”

“I know, I just… nnffff…” Shining sighed and lowered his head guiltily, which in turn made him look down at his still-straining cage. Night Light may have had that spell to keep him erect, but his son had no external excuse; regardless of what happened, Shining was still into this as much as either of them. In fact, Cadance giggled a little when she turned her head and saw where he was.

“Hehehehe~ You alright there, hun?”

“Yeah, he’ll live,” stated Night with a cockier tone. He looked back at her to add, “I think Shining just got a little overzealous back there~”

Shining groaned a little and tried to mutter, “D-Dad, come on…”

“What do you mean? I already did~”

“Daaaad!”

Cadance giggled with a hoof over her mouth. “Hmph~ Well, technically your Dad came in. Not on~”

“That’s right~” Night Light bent down and planted a more gentle kiss on the back of her head. “And that won’t be the last time either~”

Cadance beamed back at him with a blushing smile, and sighed with pure contentment. “Mmmm… I really hope you mean that…”

She paused just long enough to lean back and get closer to his muzzle. She narrowed her eyes on him, and she grew a more lustful smirk before adding slyly, “... Daddy~”

Shining heard the antsy inflection in Cadance’s voice, and saw the hungry grin his Dad made in response. After letting out a pent-up groan, Night lunged in and gave her a much deeper kiss on the lips, right in front of his blushing son.

“Whoa…” Shining was still sitting on the floor, and just fanned his face with a flustered huff. He knew that he shouldn’t have found this so hot, but his twitching chastity cage proved that he undoubtedly was. And by the time the two finally pulled their muzzles back, still smiling at each other with such intimate passion, Shining Armor grew a faint smile of his own.