The popular bunk bed series. The younger sister is excited about having sex with the man, but tries to keep her voice down so her older sister doesn't notice, but her moans leak out and the bed shakes. The quiet older sister notices this and pretends to be asleep, but gets excited by her younger sister's moans and gets wet between her legs. After having sex with the younger sister, the man reaches out to the older sister's body, who is pretending to be asleep, to have a threesome...