Unicornered

As twins, Pumpkin and Pound Cake shared a bedroom the entire time they had been growing up. From sharing the same crib, to when the nursery was upgraded with bunk beds. And of course the pegasus got the top bunk. For as long as she could remember, Pumpkin Cake was always a light sleeper. Unlike her brother, Pound Cake, who could sleep through a hurricane. It wasn't much of a problem, until he started snoring. But that would prove to be only the start of her troubles.

Soon after they had gotten their cutie marks, Pound 'discovered himself' as a colt. There were many a night where Pumpkin would be pretending to be asleep, and squint to see the silhouette of his head quickly peeking down from the top bunk to see if she was asleep. And once he went back up, she'd be subjected to listening to him clop himself off in the bed above her.

At first she didn't realize what he was doing, but it didn't take her long to figure it out. And each time, after he'd finish, he'd climb down to clean himself off with the nightstand tissues. He thought he was being so sneaky by not flying down, but when he tried to climb down, she'd be greeted with an eyeful of his freshly-jacked penis dangling under him. Pumpkin was naturally disgusted at first, if still oddly curious.

That same spring brought with it her first heat. And for the budding mare, what had begun as a feeling of disgust became an intense fascination when she too discovered herself. Her brother's penis filled many of her fantasies, even as she understood the taboo nature of her thoughts. The musk of the mare in the same bedroom as him proved to be an exacerbation to his masturbation.

Her mother recognized the signs of her daughter's first heat quickly. Between that, and the alarming rate at which the household was going through tissues, she realized it was time to separate her foals. However, they needed and extra room which they did not have. The house had become quite crowded with five grown ponies in it. Now that they were old enough to really help out their parents in the Sugar Cube Corner kitchen, the time had come for Pinkie Pie to finally get a place of her own.

Pumpkin got to keep her room, and her brother moved into the vacant room next to it. On the opposite side of Pumpkin's room was the family bathroom, and beyond that was their parents' bedroom. The walls were thin, so Pumpkin would still hear her brother snoring occasionally. Still, it was better than listening to Pinkie Pie talking in her sleep. Once she was old enough to understand what sex was, she assumed her parents did it. But if they ever did, she never heard it. Though the bathroom did offer a measure of sound insulation between them and her.

With Pound in his own room, she didn't see him tending to himself every night. But contrary to having it out of her mind, she found that she was craving it even more so. But she had to assume that he didn't feel the same way about his own sister. Therefore she needed to work up to broaching the subject gradually. She needed to make sure that he saw her in the same way that she was seeing him.

She started being more flirtatious around him, making playful, off-color remarks when their parents weren't around to hear her. When their parents were out at an appointment, or a local delivery, she'd tied her tail up into a bob-bun, leaving practically nothing to hide her modesty around him. She didn't notice him responding to her signals yet. But it hadn't been very long. And her brother wasn't the sharpest knife in the drawer.

But with Pinkie having moved out, and working full-time at Princess Twilight's School of Friendship, they were missing their long-distance delivery pony. So when the day soon came that a wealthy client needed an express delivery for Mother's Day in Fillydelphia, Pumpkin thought that she and her brother could run the shop while her parents made the delivery trip.

Her parents disagreed, feeling they they were still too young to run the shop or make the delivery alone. The solution was Cup Cake taking Pound with her to make the delivery while Pumpkin stayed behind with her father to run the shop. It was a sensible compromise. At least they were back in time for them to have a nice Mother's Day dinner.

But things we... different in the house after that trip. Pumpkin Cake couldn't place it. But something in her mare's intuition made her feel like something was off. There was a tension in the air. And it wasn't from keeping a secret Mother's Day dinner a surprise anymore.

Pumpkin feared that she had been a bit too overt with her efforts to be noticed by her brother, and he told them. Or that perhaps her parents noticed for themselves. The more she thought on it, the more she was sure that she had been careful to leave enough plausible deniability for herself. Still, she decided to reel it back for a week and hope things would go back to normal. If anything, things were even stranger.

Her brother was strutting around like a peacock after they had come back from that delivery. Her mother looked like she had stolen Celestia's crown jewels. A week later, she looked just as worried, though her bother seemed to chill out. But now her dad looked like he was practically glowing with that goofy 'I got laid last night' grin she recognized. And nopony was saying a damn thing about any of it.

Pumpkin laid awake in bed that night. She was plenty tired from working all day in the bakery. But the mystery in her home had her wracking her brain to figure out what was going on. It was like everypony was in on the big secret but her. The clock on her nightstand told her that it was so late at night that it was now early. She heard hoofsteps in the hallway coming from her parents' room. The toilet flushed in the bathroom a few minutes later. But instead of the hooves going back to the other end of the hall, they went past her room to her brother's bedroom.

"Pound?" she heard her mother's voice through the wall.

"Pound? Wake up."

"Huh? Mom? What's up?"

"It's positive."

"What?"

"I'm pregnant."

"Oh shit! What are going to do?"

"I already took care of it. I- I've been... Your father will think it's his."

"Oh. So he... Well, that's good."

"Yeah. I just wanted to let you know before I made the announcement."

"Hey, Mom?"

"Yes dear?"

"Was he... better than me?"

"Ha! No way, sweetie. He can never make me cum the way you did."

"Can we... can we do it again?"

"Pound, no. We've already gotten into enough trouble as it is."

"I know... but it's not like I can get you pregnant again."

"But your father is right down the hall."

"We'll be quiet, I promise! Please!"

"Oh my gosh! You're so hard already! I almost forgot how thick you were... Okay, fine. But you have to be quiet."

Pumpkin wasn't sure what their definition of 'quiet' was, but it was certainly different from hers. She could hear the squeaking of her brother's bed frame as her mother got into it with him. And the squeaking of her mother when her brother got into her. And the pillow could only stifle so much. After several traumatizing minutes of muffled licking, sucking, moaning and rutting emanating through her wall, it finally ended.

"Geez Pound, you came inside me so much. Have you been saving it up for me in those big balls of yours?"

"It's just been so long since you last emptied them, Mom. You need to do it more often."

"If you can make me cum like that every time, I'm gonna have to."

Pumpkin's mother staggered as quietly as she could back down the hallway to the bathroom again to wash up before carrying on to her own bedroom for the night.

Everything from the past two weeks now made sense. No wonder she had been practically invisible to her brother. All the work she had done to try to get Pound's attention for herself, and all it did was make him more worked up for their mom. Whom he had already fucked, and gotten pregnant.

"That bitch," she muttered to herself. She was a mare scorned, and Tartarus hath no fury like it. But she knew better than to get mad. No. She would get even.

The next morning she got up extra early, despite her stark lack of sleep. In the bathroom, she checked the waste basket. There was a small, pink box. It was a pregnancy test. She opened it, and inside, the tester still bore the positive sign. So it was true. She hastily stuffed it to the bottom of the bin, beneath several tissues soaked with her brother's load. She cleaned herself up and headed downstairs to start breakfast.

Everypony else joined her shortly after. The breakfast table was the briefing room for the bakery family every morning. And just as everyone finished eating, Cup Cake stood to get everypony's attention.

"I have an announcement to make. We are going to be having a new addition to the family!" she said.

Her husband was the only one even mildly surprised.

True to her promise, Cup Cake's visits to her son's bedroom became a semi-regular occurrence. Sometimes Pumpkin was still awake when it happened. Sometimes they woke her up with it. But she was forced to listen to them every. single. time.

For as much as her mother and brother had complained about being so tired before, they were both endlessly chipper while they worked now. Even her father seemed to have a bounce in his step. She overheard him cancelling their appointments with their marriage councilor. Apparently her mom must have been pulling double-duty, fucking both of them to avoid any suspicion.

Everypony in Pumpkin's house was getting great sex and great sleep, except her. But she didn't get mad. She was a patient mare. She had the ultimate dirt on both her mother and brother. She understood that blackmail was so much more useful than the simple anarchy that revealing the truth to her father would cause. She would bide her time until she had the perfect opportunity to use it against them. All she needed to do was endure the noise of her brother and mom fucking just a little while longer.

And as it should just so happen, opportunity did come knocking just two weeks later. Quite literally, in the form of the mail mare with a delivery order.

"Princess Cadance is having a Father's Day party in the Crystal Empire for the Prince!" Cup Cake read aloud to the family. "She wants four dozen of 'those amazing eclairs' that Princess Twilight keeps telling her about from Sugar Cube Corner."

"Wow! We're famous even in the Crystal Empire!?" Carrot said.

"It looks like it," Cup Cake said. "Oh, but if I deliver it for Father's Day, I won't be here for your party!"

"It's okay, honey bun," he said. "I already told you. A simple day off is all I really wanted."

"And now you can't even have that if I'm out of town. Somepony needs to cover the shop."

"It'll be fine," he assured her. "We'll just make a bunch of stock Father's Day cakes ahead of time. And Pumpkin can do custom frosting names to order. You know how good she is at that. She could almost run the place herself."

Pumpkin beamed with pride.

"Besides, I'm sure you'll make it up to me when you get home," he said in a not-so-subtle implying tone before pulling her in for a kiss. Pumpkin rolled her eyes at her parents' display of affection. Her mother cut a quick glance at Pound, who was visibly bristling at some other stallion kissing his secret special somepony. The fact that Carrot Cake was having sex with Cup Cake was something Pound had to begrudgingly accept. But watching him get it thrown in his face like this was delicious spite in which Pumpkin took some measure of glee.

"I should go with you!" Pound said with a start.

"It's just four boxes," Carrot said. "I'm sure she can handle it."

"But it's not fair!" he said. "I mean, because I've never seen the Crystal Empire. Pumpkin got to see it when she went on that field trip in Princess Twilight's School for Gifted Unicorns. And you just said that Pumpkin can practically run this place herself. It would just be like last time, when Mom and I made a delivery together."

Pumpkin was positive that it would indeed be just like last time.

"I'm not paying for an extra ticket for you to take the weekend off from work and go sight-seeing," Carrot said.

"I can pay my own way," Pound said. "I just... really want to see the Crystal Empire."

If Pumpkin's eyes rolled any harder they would have fallen out of her head.

"Oh, just let him tag along," Cup Cake said. "I'm sure you two will be fine."

"Okay. Fine," Carrot relented.

"And like you said, I'll make it up to you when I get back," Cup Cake said with wink. Carrot just smiled back, content with the arrangement.

That Saturday, they baked and assembled the eclairs and saw them off at the train station. On the way back to the bakery, Pumpkin nuzzled against her father.

"Don't worry, Daddy. I'm gonna work extra hard to make sure you get the Father's Day you deserve."

"Aww, thank you, Sweetheart. You always were such a hard worker. That's why you're Daddy's favorite. But don't tell your brother. Between you and me, I think your mother spoils him too much."

"I think so too."

"I know you. I'm sure you'll come up with something to make it a day I'll never forget."

Pumpkin smiled. Oh, Daddy... You have no idea.