Blackmailed by Her Own Son

Harry James Potter had just graduated Hogwarts, leaving as the acclaimed 'Sex God of Hogwarts', but he never truly got the woman he wanted, his mother. However, when Harry stumbled upon a dark secret of his mother's, he intends to use it to his advantage to the fullest. How will his mother react to the degradation by her beloved son? AU where everyone lived besides Voldemort.