Ever since my sister and I both moved out of our parents house we usually meet at my apartment to hook up since I live alone, my sister lives in an apartment with her best friend so for obvious reason we avoid doing anything at their place. Yesterday I went over their place to help them move her friends new bedroom set into her room and help put it together and when we were done she left to go to target leaving me and my sister alone. I asked her if she wanted to hook up real quick while she was gone and while she was skiddish at first just because we agreed to never do anything at their place we just couldn’t help ourselves. We went to her room and left the door open so we could hear anyone come through the front door and she got on her bed on her hands and knees and pulled her shorts down and I just started pounding her from behind, trying to cum as fast as I could. The rush I got from fucking my sister in her apartment where her and her best friend live was such a thrill. For the first time in awhile I enjoyed that thrill of possibly getting caught which I really only got when we lived at home and hooked up with our parents in the house. My sister just shoved her face into a pillow while I fucked her roughly from behind until I finally came inside her and took my dick out and rubbed it on her pussy before slipping back in one last time before we kissed, quickly cleaned up, and opened the window in her room and shut the door to keep the sex smell from leaving the room. Luckily her roommate didn’t come back for another 30 mins so there wasn’t a real chance of getting caught. This was actually the second time we hooked up at her apartment (the first time her roommate was out of the state on vacation with her family) so this was really the first risk we took at her place. It was thrilling just knowing I fucked her in a place we typically avoid for obvious reasons and I might try to get her to do it more often for the sake of the thrill.