He wants his sister to tell him how much she loves him

“Say it,” he would growl, gripping her hips so tight his fingers dug into her soft flesh. “Tell me I’m the best brother in the world.”

“I’m… I’m fuck,” she would moan, voice breaking with every rough thrust. “You’re the best brother in the world, Mason. The best brother… ah… fuck…”

He would pound her harder, pulling her ass back onto his cock, watching the way her cheeks rippled every time he slammed home. Her tight asshole would grip him like a vice, hot and silky.

“Louder,” he would demand, reaching forward to grab a fistful of her long black hair and yanking her head back. “Tell me how much you love your little brother while I fuck your ass.”

“I love you, Mason!” she would cry out, her voice raw and broken. “I love my little brother so much… you’re the best brother… I love you… I love you… please keep fucking my ass…”

Mason’s fantasy kept building. He imagined flipping her over onto her back, pushing her thick thighs up toward her chest so her ass was still accessible. He would slide back into her stretched hole and fuck her even deeper, watching her massive tits bounce wildly with every brutal thrust. Her light brown eyes would stay glassy and obedient, but her mouth would keep repeating the words he wanted to hear.

“You’re the best brother in the world… I love you, Mason… I love my little brother’s cock in my ass… use your big sister’s asshole… I belong to you…”

He would lean down and suck hard on one of her dark nipples while he railed her, biting just enough to make her moan louder. Her pussy would be dripping wet the whole time, juices running down to coat his balls as he destroyed her ass. He would reach between them and rub her clit roughly, making her body shake.

“Say it again,” he would growl against her tit. “Tell me you love your brother more than anything.”

“I love you more than anything, Mason!” she would scream, her voice cracking. “You’re the best brother… I love you… I love you… my ass is yours… my tits are yours… my cunt is yours… I’m your obedient big sister slut… please cum inside my ass…”

Mason would fuck her faster, the bed creaking loudly under them. He would slap her tits, watch them jiggle and turn red from his hands. He would pull out at the last second, stroke his cock a few times and paint her massive breasts and face with thick ropes of cum while she kept repeating:

“You’re the best brother in the world… I love my little brother… I love you, Mason… thank you for using your sister’s ass…”

The fantasy felt so real that Mason’s actual cock was leaking pre-cum into his shorts. His hand had unconsciously moved down to palm himself through the fabric while he sat on the couch, eyes half-closed, breathing fast. He could almost hear her voice moaning those words. Almost feel the tight grip of her asshole around him. Almost see her perfect body shaking as he used her like a cheap fucktoy.

He imagined making her clean his cock afterward with her mouth, sucking every drop while still repeating how much she loved her little brother. Then he would make her crawl around the apartment naked, ass still leaking his cum, mooing again but this time calling him Master and best brother at the same time.

The guilt hit him like a truck right after the hottest parts of the fantasy played out. This was Serena. His big sister. And here he was, sitting on the couch with a raging hard-on, fantasizing about brutally fucking her ass and making her **** herself with brother-loving dirty talk.

Mason yanked his hand away from his crotch like it burned. His face felt hot. Shame flooded through him. What the fuck was wrong with him? She was brainwashed. She wasn’t in control. Taking advantage of that would make him no better than those Alpha 7 assholes. He was supposed to be saving her, not turning her into his personal **** fuckdoll.

But the fantasy wouldn’t leave. It kept replaying in flashes, her ass rippling as he slammed into it, her massive tits bouncing, her voice cracking as she moaned “I love you, brother…” over and over. His cock stayed painfully hard, twitching every time the images flashed again.