[Ameyama Denshin] Koyoi, Suki na Ana kara

A voluptuous mother with massive breasts and hairy armpits seduces her eager son, teasing his body and promising to satisfy his desires without a condom. The intimate scenes shift to a domestic setting where she dominates the boy while another woman, possibly an aunt, watches and encourages the forbidden encounter. When the father returns, the mother hides her secret, keeping the boy's climax inside her as she revels in the secret happiness.