The first erection. "Auntie, your penis is so full it hurts~" The mother of a classmate who was nearby was confused by the situation that even her son had never experienced, but she gently helped him out, asking, "Maybe it's building up?" Before she knew it, things had escalated and she was straddling him and doing a handjob! "I can't fuck you, but I'll just rub you, okay..."