My wife returned to her hometown to attend a friend's wedding, leaving me alone with no one to handle household chores. To help out, her mother came up to Tokyo to take care of me. I've always had a preference for mature women, and I couldn't help but be drawn to my mother-in-law's voluptuous body. As she gave me a close-contact massage, I noticed my cock getting hard. I started touching myself, then took it further by using my hands and mouth to pleasure myself. Our relationship gradually deepened, crossing a line from which there was no turning back.