A week of being invited by the shiny body of my stepmother who aspires to become a lingerie model...and drowning over and over again as instinct

One day, my stepmother moved to Tokyo to live in the house where I and my wife live together. An acquaintance invited me to work as a lingerie model, and apparently he ran out with the intention of making a big decision. My wife and I decided to stay at home for just a week to soothe my mother-in-law. That night, he couldn't sleep and headed to the bathroom and found lights leaking from his mother-in-law's room. It seems that my stepmother still couldn't give up, and was wearing seductive, sexy underwear. I was captivated by my stepmother, so I naturally reached for my crotch...