Mother in Law Slave Shackles Ruri has remarried, and her husband's son is a recluse. He not only never leaves the house, but seems to be holding a grudge against her... And one day, as she was snooping around in his room, she finds pictures and a video of her having an affair with her lover... Using this material to blackmail his stepmother, the kid forcibly fucks her, fondling her colossal tits... Ruri's forced to act as his sex slave as soon as her husband's away, and the guileful humiliation escalates into total perversion.... Mother-in-law Slave Ruri Saijo.