Monoshizuka de Bijin no Mama ni Gouin ni Kyousei Shaseisaserareru Boku

Although Shizuha, an ordinary housewife is living a normal and peaceful life, she is becoming more and more frustrated because her husband has become indifferent to sex.
One day, her son expectedly compliments her on her feminine appeal. Her heart of course skips a beat when she hears that.
Lust spilling over, and the mood becoming improper, the conversation led to her jumping onto his son's most prominent part. She then sinks in to steal his virginity.
Even when she is conflicted, she continues to make up reasons everyday just to spend time with her son.
She sometimes becomes so frustrated that she goes off and do whatever she wants.
Her son also loses himself to the pleasure and goes off to his own world.

[Translated from Getchu]