Harem Alliance

There were a few things that Chuckle could do to stave off his climax. He usually would close his eyes and imagine he was pleasuring on old, ugly maid. Not an option right now, as he knew exactly who was underneath him in this moment, and that was a worse prospect. He could ease his gait and focus on slower, more powerful thrusts to make sure she came before he did, but again, that wasn't an option with the coupon enchantment forcing his hips. His signature move was to pull out and draw her in closer with his mouth, then rejoin his partner when they were both close so they could finish together. That, too, was off the table.

But there was something he could do. He could look his sister right in the eyes and apologise to her. Fortunately, she was already looking up at his face, and her eyes betrayed her fear. "I love you," he said, and he meant it.

"I love you, too."

Now came the words he needed to say. The two words that were the second step in any meaningful apology. He just had to say "I'm sorry," and it would bum him out enough to stave off his ejaculation. He took a deep breath, and the words dripped from his lips:

"I'm cumming."

With no further warning, his hips bucked faster, then stopped, slamming into her so hard that his urethra penetrated her cervix with ease, pumping into her womb with gusto. Even if he were in control of his own actions, her hooves held him inside of her, not letting him pull away.

"Yes!" she shouted. "Fill me, big brother!"

This was happening. He had just filled his sister with cum, and there was no going back from this point. They were screwed, and they both knew it. As they looked at each other, Chuckle now knew how it felt to be his sister. Fate had dealt her a bad hand, and now it had done the same to him.

He'd done his utmost to keep her happy when they were kids. It was the reason he'd become a comedian. But now, as she looked him in the eyes, he could only think of one thing: He still wanted her to feel better. Once this sex was over, and they could leave, he would spend more time with her, making her laugh and smile as much as he possibly could.

His hips began to move again, splattering his cum everywhere as it leaked out of her snatch. That was all well and good, as bringing more of it out meant that there was less in her. It was like pumping her stomach, but instead, it was her uterus. If he could empty it out, it would reduce the chance of pregnancy significantly. Or, so he hoped...

Eight times. Eight times, he'd cum inside of his sister. She'd swallowed the first load, of course, but the next seven had gone up into her womb. He was exhausted, he was sore, and he was wondering how he wasn't shooting dry blanks by now. They'd been at it for nearly five hours, and still, no stop. Weeping had passed out twice already, and was leaking so much fluid that she had absolutely soaked through the rug and into the carpet. She lay trembling in a puddle, unable to know anything that was happening around her. But at least she was smiling, even if doing so absently.

Chuckle rolled over and looked at the zebra, who was lying upside-down on the couch, covered head to tail in his own cum from the multiple loads he'd blown all over himself as he'd watched the display. "Please," Chuckle panted, "Just let us go. We don't want to do this anymore..."

The zebra looked up, a big smile on his face as he rolled off the couch. "I have no more seed to spill. But you are here of your own free will."

"What?!" shot Chuckle. "No, we're not! You forced us to come here and have sex with each other. You forced that to happen!"

"True, very true," nodded the zebra. "I made it begin. But after those feelings hidden deep within came up to the surface, and you confessed your desire, you both gave in and succumbed to your fire."

"What the fuck are you talking about?"

"The contract I gave you has limited powers. It can only make you work to a max of two hours. You should really have read the fine print, you know; you could leave here by choice three hours ago."

Chuckle pulled out the coupon, which now had a shiny green stamp on it that said "REDEEMED." He fished around in Weeping's belongings and found that hers, too, had been stamped, despite nopony stamping it. He'd heard that such a thing could happen, and if it did, they could take these to the local purser's office and reimburse them for a payout from the state equal to five hundred bits each.

He looked over at his sister, spewing his cum from her pussy with every twitch as she slept. All he could think about while they were fucking the ever-loving shit out of each other was that he'd never seen her so happy before. Perhaps this was his chance to help her find more reasons to smile. She certainly deserved it, after all she'd been through, and he wanted her to have it. And after crossing the boundary so completely that he'd need to see a doctor tomorrow about his erection lasting longer than four hours, it was impossible for their relationship to go back to how it had been. They could fall apart, be exceptionally uncomfortable around each other, or accept that this was part of their lives now. Only one of those led to any amount of happiness, and that's the route he wanted to take.

"It's late," he said finally, standing up with a large degree of difficulty. He was far more sore than he'd realized, and there was no way he was going to make it home, much less carrying Weeping on his back. Plus, while he did want her to be happy, he didn't want to announce to the world that they'd just spent five hours fucking each other, even if two of them were compulsory. "Do you mind if we crash here, and use your shower before we leave?"

"Take the bed and snuggle tight," yawned the zebra. "I don't think I'll move from this sofa tonight..."

With a nod, Chuckle scooped his sister up in his hooves, draping her over his shoulder and carrying her into the bedroom.