Jon's room suddenly started changing. His bed was replaced by a larger one and his stuff was moved to one side of the room. The other side was filled up with his older sister Becky's stuff. Even as his sister, Jon thought Becky was hot and now that sibling incest was normal, he was fucking her as well. I finally get to see Becky naked, Jon thought, a grin on his face. Becky walked in a moment later. She was busy putting her dark brown hair in a pony tail and was wearing a denim skirt and no shirt, showing off the plain, white bra she was wearing. Jon openly ogled his sister as he felt his manhood get stiff.
"Hey, Jon," said Becky. She seemed unashamed of being caught half-dressed by her brother, but then, since they shared a room and fucked each other regularly, this was probably normal for them. "Have you seen my lucky bra? You know, the frilly black one? I want it for our date tonight."
"Our date?" Jon asked. Becky already had a boyfriend. Why would she be going out with Jon?
"Of course our date, silly," said Karyn. "Its one of those sibling double dates. You know, my boyfriend goes out with his sister, I go out with you. You go out with me; I go out with you and my boyfriend; he goes out with me and his sister. We fuck each other's brains out afterward. We've gone on these before, Jon. I thought you enjoyed them. Or are you losing interest in your big sis' boobs?" She cupped her boobs in her hands and squeezed them playfully.
"I could never get tired of your tits," said Jon. He had always thought they were cute before and they were cuter now that he had access to them.
Slipping her bra off and letting her boobs free, she said, "Would you like a little preview, bro, before we go out?"
"Sure thing," said Jon. Becky, still topless, gently pushed Jon onto their bed and sat on his lap. Jon then tentatively took the nearer of her boobs and wrapped his mouth around the nipple, sucking away.
Becky moaned softly, wrapped her arms around Jon and said, "Just like that, Jon. Just like that. You know what your big sis wants." It was one of the wierdest and most beautiful things that he had ever experienced.
