MDYD-371 - Mother-in-law Scent Maki Tomoda (2008)

Maki, a mother-in-law who has grown her armpit hair since her husband died. His son-in-law, Nobuo, gets excited about her every day. One day, Nobuo sees an affair between his uncle and Maki, and Maki finds out about it. From that day on, Maki indulges in love affairs as if playing with Nobuo. And their relationship escalates...