The brother sees his sister as a sexual object, but he holds himself back with reason. However, when his sister tells him she is pregnant, he is excited by her defenseless appearance, saying "Because I'm her brother," and he reaches out to her body. At first, the sister is confused, but she can't refuse and gives him a handjob and a blowjob, and the brother's demands escalate. The sister's body also begins to feel frustrated and can't hold back, so she asks for her brother's dick, and they end up having creampie sex...