Kumi Kanzaki, 42 years old. Worried about her son who was feeling down after being teased by his friends about his foreskin, Kumi pulled down his pants to check his penis. Sure enough, her son's foreskin was uncircumcised, but even after pulling it back, it went right back in place. As she repeated this, her son's penis gradually grew bigger, and Kumi began to suck it, forgetting that she was a mother...