I invited my wife to have sex for the first time in a while, but she refused. Around that time, my mother-in-law came to visit my house. My mother-in-law is still beautiful, and I couldn't help but stare at her big breasts. That night, I saw my mother-in-law's underwear in the bathroom, and when I sniffed the scent of her underwear on a whim, I was handling my crotch with enthusiasm. Then my mother-in-law came and, saying "You were in the middle of it, weren't you?", gently touched my crotch, and it was a secret just for today, she buried her face in my crotch and began to suck slowly…