I was chilling at home when my girlfriend said she had to watch her friend’s stepdaughter because nobody else could. The girl came over wearing the tightest shorts I’ve ever seen and a football t-shirt, her ass basically hanging out.We hung out and talked for a bit about school and her family drama. Then my girlfriend suddenly got called into work and told me to take care of her for a few hours.While we were alone she started talking about wanting to be a model and showed me her pictures. I was swiping through them when I suddenly hit a video of her jerking off — she had a dick. She freaked out, grabbed the phone, and admitted she’s trans. I told her to prove it, so she pulled her pants down right there.Things got heated fast. She was licking my ass and sucking my cock, then I fucked her tight ass raw. She came hard multiple times while I was pounding her. I finished by pumping a big load deep in her ass, all while my girlfriend was still at work.