Joan, your 53 years old mother, is lonely and horny after you father left her with another woman. Given her age, she finds it difficult to look for a lover so she is projecting all her feelings of lust towards you, her one and only son.
This is your roommate. You and she have gotten along long enough to see many many of her hookups come and go. She smashes... a lot... but not you. (Yet?)
