Incest with big butt: The reason my mother started wearing T-backs

A son, Kenichi, who lost his father and lives with his mother, Shinobu. One afternoon, Kenichi noticed that Shinobu was wearing a thong. ``Why is my mother, who is usually so plain and has no hint of sex appeal?'' Kenichi pretends to go out and scouts the house, but he witnesses his mother having sex with her cheating partner! ``My mother is an introverted woman! She is betraying me and my dead father!'' Kenichi begins to feel complex emotions that he has never experienced before.