Emi had been living alone since her husband passed away last year. Around three months ago, her daughter and son-in-law asked to move in, and they've been living together since then. While she's happy to be living with her daughter again and has no complaints about the arrangement, she finds herself constantly aware of the young man's presence in the house. Emi becomes aroused by her daughter and son-in-law's intimate moments and starts masturbating. One day, her son-in-law suggests giving her a massage, and she agrees. Her buttocks jiggle as they're slick with oil. When he asks if there's anything more pleasurable than a massage, she can't help but give in...