The brother is taking care of his sister who has a fever. The sister asks him to put the suppository she got from the hospital in her ass, and the kind brother listens and inserts the suppository. This is the trigger for the sister to awaken to her anal desires. She gets aroused by anal masturbation, and in the bathroom, her brother sticks his finger in her anus and licks it, and her actions escalate. The sister goes to her brother's room and finally begs for anal sex. The sister smiles and tells her confused brother, "If it's anal, it's not incest." But the sister's actions don't end there...