Public train ride turns into wild sex with a friend

So, I was riding the train to work and my buddy's chick was with me. She's a total amateur, but she's got a body that would make any man weak at the knees. She's got a big, fat ass that's just begging to be spanked, and natural tits that are just as tasty. Anyway, we were chatting away when she started flashing her huge, juicy boobs right through the window. It was pretty crazy, but it got me super horny. I mean, she's got these big, brown eyes that just make you want to screw her right then and there. So, I ended up giving her a quick bang on the train. It was pretty wild, but totally worth it. The sight of her fat, brown ass bouncing up and down as she rode me was just too much to handle. In the end, I came all over her big, fat ass, leaving a sticky trail for my friend to clean up.