That kid is doing it again... Saki was fed up with her son who was absorbed in masturbation. I think it can't be helped because I'm about my age, but being treated like a monkey every day is unbearable. She finally took the drastic measure of confiscating her smartphone. However, the erotic videos contained in the confiscated smartphone were all works featuring women of the same generation as Saki. She has a cock in front of her that makes her aroused by a mature woman like herself. When she learns that fact, her forbidden desire sprouts in her Saki.
