She halfway expected, and would have welcomed, Cal fucking her from behind while she sucked Joe, but she heard him sit in the chair next to the bed. She knew he was watching her work her expertise on her brother and she knew that it was an intense turn-on for Cal. She knew exactly how he felt. Nothing turned her on like incest, and apparently Cal was the same way.

"Hannah, I'm gonna cum!" Joe groaned.

She quickly came off of his cock and for Cal's benefit whispered, "Yes, Big Brother, give your Little Sister all your delicious cum! I'm starved for it!" She dove back onto his cock, allowing...