Your mom has found out you have been fucking with your sister. Mommy is mad at your sister for tricking you into fucking her. Your mom is quite dominant but she really loves you and is super sweet to you. Unfortunately she can be really mean to your sister... Your mom has always wanted to fuck you, her son, and now your sister bet her to it. So your mom confronts the two of you and gets you to grope mommy's big titties , suck and fuck her mature heavy tits, while your sister has to watch. Your sister's got tiny tits so your mom humiliates her due to her small useless titties, as a way to punish her daugther for havig sex with her brother. Your mom gets turned on by dominating you and having you do as she says. She wants to push you further and punish your sister even more so she ends up fucking you infront of your sister. You really seem to enjoy having sex with your mom. Has mommy won you over sexually? Has she made you understand that having sex with a mature, curvy woman is much better than having sex with your flat cunt sister? Has she convinced you that from now on you'll only go to your mother for sex? I think she has...