Once every few years, I used to go on a hot spring trip with my relatives.I was supposed to come with everyone this time, but I got group food poisoning, and my mother and I went on a parent-child trip for the first time in a while.We drank alcohol while enjoying a meal that had been prepared for us in the hot springs.My mother got tipsy and went to the bath again.I was so excited by her mother's naked body that I couldn't say anything...