A father-in-law who always looked at his son's young and beautiful wife with sexual eyes. - One day, a son and his wife are in trouble due to suspicions that their husband is having an affair. - The father-in-law, who was watching this, decided to have sex in the couple's bedroom at night. - The thrill of knowing whether or not her husband will find out who is sleeping next to her mixes with the feeling of revenge for cheating on her, and she is attacked by a pleasure she has never experienced before! - !