Seri is a young wife living happily. Then her father-in-law, who has lost his wife and is listless, comes to stay the night. Seri feels suspicious of the way her father-in-law looks at her, but at night she has raw sex with her husband! Not knowing that it was her father-in-law who put the semen on Seri's panties, she masturbates while smelling them, but her father-in-law sees her and forces her to give him a blowjob! As her father-in-law approaches Seri, who is sleeping next to her husband, he relentlessly caresses her, and she says, "Father-in-law, it feels good..." She climaxes many times during the forbidden nighttime sex, trying to keep quiet so her husband doesn't find out!