Saya, an older sister, is treated as a mouth-pussy slave by her younger brother. Because she has had sex with her brother a few times in the past, the relationship has dragged on every time. Saya really wants to end this relationship, but she has no choice but to continue it because she doesn't know what her brother might do if she makes him angry. Today, while their parents are away, her brother acts as a mouth-pussy slave in the house, with his hard cock plugged in the back of his throat, and without a contraceptive, he sinks his cock into her vagina and shakes his hips as if it's natural.