Steamy incest - Mother and child bathing

Yui was frustrated because of her husband, who is busy with work and is often away. One day, her step-son Akira is seen masturbating in the bathroom. Excited, Akira touches Yui's sleeping body, but when Yui wakes up, she tries to escape. Unable to withstand the pain in her body, Yui continues to hold Akira in and stack her bodies. After that, Akira starts to seek Yui's body every time she happens...