He fills his sister's pussy to the brim

Stevie kept holding his sister down as he slammed into her tight pussy from behind. As much as she was begging him to fuck her harder, to fill her up, to make her his ****, he couldn't quite believe his luck. Not only did he get to fuck Emily, but she was loving it. His perfect sister was loving getting held down and fucked from behind like a slutty whore.

Emily bucked into her brother, arching her back as she was pounded into the bed and spreading her thighs for maximum accessibility.

He grabbed her hair, pulling her head back roughly and making her back arch more and more, making her open her mouth in ecstacy.

"Please give me your cum," she whispered. "I need your cum in my pussy, Stevie. Fill my pussy. Fill your sister's hot pussy with your cum."

Her brother groaned and came, filling her pussy to the brim with his incestuous seed.

A certain glazed look came over Emily's eyes as her brother finished, his thick seed swimming through every nook of her womb, knocking her up, binding her fate to his.

She crawled submissively from underneath her spent brother and, keeping her ass in the air like a proper slavegirl, wrapped her lips around the brotherly cock and started cleaning their mixed juices from his balls and cock. Her brother ran his fingers through her brown hair as she worshiped the cock that had fucked her.

After lapping his cock clean, she buried her nose in his crotch and inhaled. It smelled wonderful. She knew that she was now her brother's wanton slut forever.

"I am yours forever, Stevie," she whispered meekly. "I will do anything you ask. Make me prove it. Make me prove that your sister is your slutty obedient ****. I will obey your every word."

Stevie smirked. He had a couple ideas.