A new family after remarriage. The father-in-law and stepchild Jun are also on good terms, and it was supposed to be a happy scene... A father-in-law who can't stop lusting after a J● boy who grew up with a big butt ready to eat. He finally begins to train her as a creampie masturbator by dousing her with aphrodisiacs and having sex with her as much as she wants. At night, she has sexual intercourse with her big ass, plays with toys, inserts masturbation, and gives him a blow job...and Jun, whose sense of reason has been removed, straddles her father-in-law and forces her pussy on his own. She turned into a sexual monster who shakes her big ass and devours her stepfather's dick with a pile driving piston.