Second-generation NTR: Wife raped by daughter's husband... Momoko Isshiki ROE-419

My beloved daughter, Ichika, got married. Because I was so lonely, even though people said I was just a relative, I still converted our house into a second-generation home. My wife, Momoko, was also happy to live with my daughter and her husband, and she got along well with her son-in-law, Hatsuki. We'd always had a happy family life without any complaints. Until that day… I don't know when it started, but Momoko always found various excuses to go to my daughter and her husband's house. Not only that, even when she said she was going out with my daughter, she would inexplicably be at home, and she always used unnatural lies…