Tsukasa-san went to stay at her husband's parents' house. She saw her father-in-law cheating with her brother-in-law's wife and she can't stop feeling uneasy. When she returned to her parents' house, she tried to help out by vacuuming the stairs and living room, but her father-in-law was staring up her skirt. She couldn't stop being horny at her father-in-law's sexual desire, which is incomparable to her husband who hasn't had sex with her lately. She was found out to be a masochist and was attacked by her father-in-law when the family was not around. She was made to wear panties with a vibrator shoved inside her, and she was even more excited by the fear that her mother-in-law or husband would come near and find out. When her mother-in-law and husband went out, she couldn't stop. She was a lewd masochistic wife who took her father-in-law's cock, which was too hard for his age, in her mouth, straddled him, and moved her hips.