My friend's big-titted teacher gets taken from behind

My buddy's got a pretty unique girlfriend, she's not exactly what you'd call skinny, more of a full-figured girl with a nice, plump ass. He's always trying to get me to bang her, but I'm not really into that kind of thing. But, when we were hanging out at his place, she decided to show me some moves in the kitchen and, well, things kinda took a wild turn. She got down on her knees in front of me and started sucking my cock, just like a pro. It was pretty damn hot, but then she got up and bent over, ready for me to fuck her from behind. I didn't really want to, but her big ass was just too tempting. After a few minutes of banging her, I came all over her fat ass.