My Friend's Mother - Last Chapter - Ayame Shiozaki

Her son's childhood friend Yusuke grew up without knowing a mother's warmth. Ayame, hoping to offer some comfort, had treated him like a mother for years, showering him with affection. Yusuke also adored her, and they built a good relationship. But now that Yusuke was growing into a full-fledged man, Ayame sensed he was beginning to see her not as a mother, but as a woman. It's about time this mother-and-child game ends. Just as she thought that, Ayame was caught by Yusuke while masturbating...