You fuck their asses, they both cum, you don't cum.

You roll little Jessie over onto her stomach in the grass, and lay Jenna down on top of her, also on her stomach. Both girls are naked, tight little asses in the air toward you, tied up and struggling. "No! Bastard!" Jenna swears at you, while her sister cries "Please, please don't **** us."

You free your huge cock from your pants, and ram it up little Jessie's tight teenaged asshole. Jessie screams as you hard-fuck her tender asshole, gripping your girlfriend's ass with your hands. "No! No! Please stop!" Jenna yells, "Don't **** my sister!" You keep pumping your cock in Jessie's tight ass, and her screams of pain and protest turn to moans and cries of pleasure. "Ohhh," your girlfriend's sister moans, "He's ... he's so ... he's making me ... cuummm!" You pull your cock out of her, and ram it into your hot girlfriend, fucking Jenna hard up her tight asshole too. "No!", she screams, "Oh god ... you won't make me ... cuummm!" Both girls came hard from you **** their assholes, and they hated it. They're both crying now, madder then ever, and still tied up on the grass.

(Mark +2 xp for making them both cum)

You're still raging hard. But someone must have heard them screaming. You look around.