Fucking him in the ass!

"Get ready Joshie, I'm got a huuuuge reward for you." She backs up a little, grabbing is arms and holding him behind his back. She draws her hips back and grabs her cock, adjusting it until the head was touching his asshole. Liz just got a sense of deja vu, she's gonna break her little bro just like she broke their mom.

"You ready, Joshie!"

She didn't wait for his response. She was able to push at least half of her enormous hog into his ass, since she already stretched out his ass earlier. Still, it was so large she struggled to put in anything more than that, not for a lack of trying, but she was getting impatient. She just started fucking him, each time she slammed her cock inside Josh, his ass widen a little more, letter her put more of her cock in his ass. Josh could feel his ass being stretched by Liz's cock. It hurt like hell, he could feel tears welling up in his eyes Liz's cock drilled into his ass. He screamed as Liz's **** more of her cock inside him, until, eventually...

Her hips finally touched his ass. A wild, manic grin spread across her face as she finally managed to fit all her cock inside of Josh's ass. She looked at Josh's face, and he's sniveling and crying like a child, his legs wobbling like stilts. He wouldn't even be standing if Liz wasn't holding him up right now. "Aww, how cute," Liz wipes his tears, "how pathetic..." She giggles in his ear, mocking him as he wept. "Look at your legs, come ooon. You can't handle a little cock? At this point my cock is holding you up!"

She fully wraps her arms around his arm, holding him up by the waist and forcing his body into the same position it was earlier. Then, she started drawing her hips as far back as she could, with only her the head of her cock still in his ass. Then she slammed into him as hard as she can, cumming as soon her hips reunites with his ass. They both screamed as she came, Josh screamed especially loud as he felt his stomach bloating up until he looked like he was nine months pregnant! While they were both panting like dogs, Josh looks down at his stomach. He's horrified with how big his stomach looked, it's stretched out with Liz's cum. He feels unbelievably full, her cum seemed to weigh him down, making him even harder for him to stand properly. At least he can feel some sense of relief since it's all over, there's now way Liz has anymore gas in the tank!

Josh is ready to let his body fall, rest on his overstuffed belly and deal with all this nonsense tomorrow. He could feel her massive cock starting to slide out of his asshole, and his consciousness fading away. That is, until he feels Liz's grip tighten around his waist. "Oh no, Joshie, I'm not done yet." She moves her arms up to his chest, and picks him back up. "You really think my balls would be empty after only cumming once?" She **** her cock back in, confirm his fears. "Nooo, little Joshie, I'm FAR too virile than that..."

She started slow, easing her little brother into it. Josh was screaming with each thrust. As Liz picked up the pace, Josh found his screams being replaced with lewd moaning. The pleasure he felt, which was building which each thrust was why he feared his sister so much. She wasn't just imposing her will on him physically, but mentally as well. To Josh, it felt like Liz was slowly warping him into what she wanted him to be, which is clearly a subservient cumslut for her. Josh realized he probably already did this to their mom too, that would at least explain why his mom hasn't rushed upstairs to stop this madness yet. He was certainly screaming loud enough for her to hear. Liz's grunting grew louder as she neared her climax, and when she finally came again, she roared and snarled like a feral animal. She blasting more of her her hot jizz into Josh's stomach, pushing out his stomach even further. She thrusted with each cumblast; not stopping until he looked to be pregnant with triplets! Josh screamed, not with pain, but with lust. A pure, cowardly, subservient lust only a loyal cumslut could give. Liz heard this, and knew what this meant. Josh is truly broken, and is now ready to be her "little brother." They stayed in this position for a little longer, catching both of their breaths as they took their time to recover.

"So, little bro..." Liz wheezed out, still breathing heavy, "you ready, for more?" Her cock twitched in Josh's ass, showing while she might be a little tired, her cock isn't.

Josh felt her cock twitching in his ass too, his big sister's rod felt as hard as steel in his ass, and now he realized he's starting to enjoy this. He likes looking his bloated stomach, full of his sister's cum. He likes being held and restrained by someone stronger than him. He likes being dominated. He was afraid at first, but now, why shouldn't he just accept it? He struggled to find the words at first, but soon he knew exactly what to say.

"Yes, fuck me until you can't anymore, big sis!"

That was all she needed to hear. She grabbed his thighs and lifted him up into the air, turning him around and now having her back face the wall. Her hands holding Josh from under his knees, her hard cock helped Liz hold up Josh. Her thrusts were awkward at first, this was a new position for her after all. This resulted in her thrusts having little power behind them, her cock barely moving in Josh's ass. Josh was feeling a little disappointed at his big sister's awkward thrusting. Liz should have a little more power behind her thrusts, she should be completely destroying him right now! So, Josh decided to speak up and encourage her.

"Come on Liz, can't you put a little more power in your hips?"

Liz grew enraged, not just by his taunting, but also speaking without permission. She knew she need to remind him of his place, and she knew just the way to do it. She fixed her position, spreading her legs farther apart and holding his legs up by wrapping her arms around them, forcing Josh into a boxy position, which made it easier for Liz to punish his ass, which is exactly what she planned to do. Now able to generate a lot more power, she was able to properly tear his ass apart. She drew her hips back and slammed her cock into his ass. "Like that Josh?" she asked in between thrusts "Is that enough power for you? Because, I got plenty more where that came from!" Liz was growing as she fucked Josh, her cock burying itself into Josh's stomach, with more pre pouring out and filling Josh. Her large, heavy ballsack moved with her thrusts, so large they actually bounced off her thighs. They were so large now, the size of cantaloupes to be exact, were actually hitting Josh's 'little' balls, crushing them each time they bounced from Liz's thighs.

Despite the pain, Josh seemed to enjoy the pounding his sister gave him, so Liz decided to up the tempo again. She squared up her stance, leaned in, and started thrusting as fast as she could. She came fast, but that was no problem for her. There was plenty of jizz left in the tank. She seemed to cum with each thrust, blasting so much cum into Josh's stomach until it could no longer hold it all in. Soon waves of cum started to pour down from Josh's ass, and cover the floor below them. With each thrust, Liz just kept growing larger, he head was nearing the celling, her biceps growing bigger than Josh's head, and her cock were growing so big it actually showed on Josh's stomach, despite all the cum that was still inside him. Josh was completely lost in a lustful bliss, his eyes completely rolled back. He started cumming on his own, not like anyone would notice due to the downpour that was coming from his ass. He was moaning as loud as he could, his voice getting hoarse due to his constant moaning. Still, he wanted his sister to know how much he loved her, and how badly he wanted to stay by her side her greatest cumslut. He couldn't get much of that out as Liz's cum actually started going out through his nose and his mouth. His last thoughts before losing consciousness by chocking on Liz's was wishing that this moment could last forever.

Liz could not pay any attention to her brother chocking on her cum, as her own mind and body were wracked with the kind of sexual euphoria that doesn't allow you to focus on anything else. She grunted, growled, snarled, and screamed, she was fully lost to the animalistic lust that had been guiding her actions ever she started growing. The rest of the world was completely shut off to her as she came endlessly, her balls clenching and squeezing as rivers of cum blasted out like a geyser. She screamed and howled she desperately thrusts, continuously pounding her brother's limp body in an effort to empty her huge balls. She kept on, thrusting and pumping her brother full of her cum until she just can't. He body just runs out of energy. she loses her grip on Josh, his body soon sliding off her cock and landing on top of his massive belly, now looking large enough to hold two fully grown men! As for Liz, just cause her body was tired, doesn't mean her cock wasn't. It wasn't fully hard anymore, but it still spewed large ropes of cum that sprayed all over the room. Josh noticed this when his girlfriend managed to wake him up by trying to empty out his stomach. Coughing out enough cum until his throat was clear, they both noticed Liz was still drowning the room in cum. They both agreed that it was unacceptable for their goddess to go to sleep unsatisfied, so Josh worked with Holly to drag himself to their master.

Liz was feeling exhausted, she laid on the ground, not even having the energy to stroke her cock. It was infuriating to for her balls to not be emptied, but what could she do about it? She was completely drained, and only had the energy to keep her eyes open and watcher her cock slowly start to harden again. That is, until Josh and Holly finally reach Liz and began duitfully worshipping her cock.

"D-don't worry Liz-" Josh said before he coughed out more cum. "We won't let our big sis go to sleep without fully emptying her balls."

Holly showed her agreement by going to town on Liz's might member, religiously licking it everywhere she could reach, and guzzling down Liz's jizz as it cascaded down from high above her head. Josh join in too, doing what he could with his oversized stomach slowing him down. Liz could only grunt in approval as her consciousness faded, only hoping she wouldn't be hard tomorrow.

The End... for Now?