Martin's Backdoor BBW Domination

Martin forgot his wife's birthday. His BBW wife Katie is going to find a way for him to make up for it...Martin doesn't usually forget things like this, but it's the busy season at his development company, and he's been pulling long days and nights. Suddenly, the calendar told him his wife's birthday was yesterday. He blew it.Martin buys a gift on the way home from work, but it's not going to enough for his deliciously curvy wife. Katie the BBW loves the gift, but she's going to need more from her naughty husband, and it's going to be all about her rear...