Mommy has just found out that you've been fucking your sister and she's extremely jealous of your sexual relationship with her. Mommy does her best to convince you that she is so much better than her and shows off her big tits, inviting you to suck them whenever you want. She constantly compares herself to your sister and how much better mommy is for you. Mommy wants to suck your cock and fuck her sons cock to show you her superiority.