Great fuck with my stepsister, Christmas present

My dad got a new girlfriend and it's the first Christmas the two families spend together, but seeing how they're doing I hope they won't be the last, haha. my new stepsister came to me every day we were there, even when we took the typical family photo. the bitch made me very horny and in the end I had to fuck her. we just took the picture and my dad went with his girlfriend to prepare things for dinner, so we had some time alone. I lifted the schoolgirl skirt I was wearing, put her on all fours and fucked her hard. the aunt is very naughty, a sweet teenager but with a cruel face, a face that I ended up leaving full of semen, haha.