Grov knullad bästa väns styvsyster medan han inte var hemma

I went to visit my best friend and he asked him to wait while he went to the store. I thought I was home alone, but suddenly his stepsister came out to me, we started talking and she was clearly trying to hint to me that she liked me. She called me to her room, supposedly to help her with something, but what was my surprise when she came out to me in a transparent bodysuit and high heels? I couldn't say no and fucked her hard while my best friend was away.