woman is engaged to an old man for his fortune. the adult son openly calls her a gold digger (possibly in the presence of his father). after they marry, she manipulates the father into letting her 'adopt' the son, since she'll never have kids of her own. This gives her power over his trust. She then goes to the son, confirming his suspicions, she's a gold-digger, only trouble is, she needs more than gold, she has a healthy libido. Her new husband can't really get it up for her, and she needs a plaything. The son is agast and tries to throw her out, but she stops him with the adoption paperwork. Explains that she now has control of the trust as she starts to seduce him. He's unwilling, but she is good at what she does.