[BKD-289] Mother-child mating 【Kamatatake Road】 Yukina Miyauchi

Yukina raised her son Masaaki until she graduated from college with only one hand, and was able to get a job without any problems. With a job, Masaaki began to live alone, and Yukina also ended up living alone. On the day of Yukina's 50th birthday, Masaaki invited her to go on a trip to hot springs as a birthday present. Yukina felt excited by Masaaki's body that she had seen for the first time in a long time while traveling. Masaaki also had an erection in his mother's underwear. Where do they end up?