During my wife's pregnancy, my mother-in-law Yuna came to Tokyo to support my surroundings. I was forbidden to smoke and masturbate by my girlfriend's wife, but I couldn't take my eyes off the beautiful and attractive Yuna. Then one night, her wife finds out that she masturbates in secret and gets into a fight. After her wife's bedtime, I sniffed Yuna's underwear and it was witnessed by Yuna. She didn't blame me, Yuna-san, and she reached out her hand to my crotch because I would solve it.