The house was packed for the Halloween party, but by midnight most of the family had cleared out. Only Jake and his younger sister Emily stayed behind, both still in costume. She was dressed as a slutty devil in a tight red latex dress that barely covered her ass, horns on her head and fishnets on her legs. He was a werewolf, shirtless with fake fur and torn jeans. They had been drinking since nine, and the cheap vodka had them loose.
Emily kicked off her heels and flopped on the couch. "Everyone else is gone. Just us freaks left," she said, laughing. Jake sat next to her, close enough that their thighs touched. "Yeah, and you look like you need to get fucked in that outfit," he shot back. The words hung there. Normally she'd slap him, but she just smirked and spread her legs a little so the dress rode up.
"You wish, big brother. Bet you've jerked off thinking about your sister's pussy before." Her voice was low and dirty. Jake's cock twitched in his jeans. He reached over and grabbed her thigh hard. "Fuck yes I have. Every time you prance around in those tiny shorts, I want to bend you over and pound that tight cunt." Emily moaned softly and leaned in. "Then do it. Right now. No one will know."
Jake yanked the latex dress up to her waist. She wasn't wearing panties. Her shaved pussy was already wet, lips puffy and glistening. He shoved two fingers straight inside her, pumping hard. "Goddamn, sis, you're soaked. Been waiting for your brother's cock all night?" Emily bucked against his hand. "Yes, fuck, finger that hole. Make me come before you fuck me."
He dropped to his knees between her legs and buried his face in her cunt. His tongue lapped at her clit while his fingers curled inside her, hitting that spot that made her thighs shake. Emily grabbed his hair and ground against his mouth. "Eat your sister's pussy, you dirty fuck. Suck on it." Jake sucked her swollen clit between his lips and flicked it fast. She came hard, juices coating his chin, her moans loud in the empty house.
Emily pushed him back and tore at his jeans. His thick cock sprang out, already leaking. She wrapped her hand around it and stroked once before swallowing half of it in one go. "Mmm, brother's dick tastes so good," she mumbled around the shaft, spit running down to his balls. Jake held her horns and fucked her throat, making her gag. "Take it all, little sis. Choke on this cock you've been teasing."
She pulled off, strings of saliva connecting her lips to his dick. "Fuck me. Put it in your sister's cunt right now." Emily turned around, bent over the couch, and spread her ass cheeks. Jake lined up and slammed into her soaked pussy in one thrust. They both groaned. He gripped her hips and started pounding, the wet slap of skin loud and filthy. "Your pussy's gripping me so tight. Fuck, I've wanted to wreck this hole for years."
Emily pushed back to meet every thrust. "Harder, Jake. Pound your sister's cunt like you mean it. Fill me up." He reached around and rubbed her clit while he fucked her deep, balls slapping her ass. She came again, walls fluttering around his cock, but he didn't stop. He pulled out, flipped her onto her back, and shoved back in, legs over his shoulders so he could go even deeper.
They fucked like animals for what felt like an hour. He flipped her again, took her from behind while she clawed the cushions. Then she rode him, latex dress still bunched at her waist, tits bouncing as she slammed down on his cock. "I'm gonna come in you," he warned. "Do it. Breed your sister's pussy. Give me all that cum." Jake grabbed her ass and exploded, shooting thick ropes inside her while she ground down and came with him.
They didn't stop there.
After a break for more drinks, Emily sucked him hard again and climbed on for round two, this time with her riding reverse so he could watch his cock disappear into her cum-filled cunt. By the time the sun started coming up, they were both sticky with sweat and cum, costumes ruined, but grinning like they'd just discovered the best Halloween secret ever. Emily kissed him sloppy and said, "Same time next year, big brother. And maybe we don't wait that long."
