Six months have passed since Mitsuyo's late-life divorce. She now lives with her daughter and son-in-law and is satisfied with her life. However, Mitsuyo has a secret. Half a year ago, when her divorce was finalized, she was drinking to celebrate. When her son-in-law returned home, she hugged and kissed him, and they had sex, promising to keep it a secret from her daughter. Since then, she has continued her relationship with her son-in-law behind her daughter's back. One night, after Mitsuyo finished bathing, her son-in-law came to her and indulged in pleasure with a blowjob and fingering. Afterward, the son-in-law also fucked his wife, who was on her ovulation day. Mitsuyo masturbated with a vegetable while imagining this. She thought these secret days would continue, but...