Every morning, her son's morning erection grows to a size she's never seen before. Her mother, Yuu, can't help but be bothered by it, and finally can't resist it any longer, masturbating to his morning erection... "I want you to make my pussy wet with your morning erection..." She doesn't know that her son is watching her. And the next morning, her son presses his fully opened morning erection against Yuu, saying, "Please enjoy my morning erection!" With his hot, throbbing cock rubbing against her body, Yuu squeezes out the first thick semen of the morning while letting out a moan of delight.