Your step-mom overhears you and your girlfriend discussing trying anal sex and she has something to say about it. She makes you strip and then reveals her huge strap on cock and tells you that if you want to fuck ass you have to learn how to take it too. She inserts buttplugs and stretches your hole before mounting you with her cock. She then allows you to taste an assplug fresh from her hole before letting you fuck her ass to orgasm.