I got myself into a sticky situation with my sil. So my wife is at work and asked me to drop something off at her sisters house. So off I go to drop off said item, she invited me in for a drink as she’s bored so after a while sitting on the couch chatting I noticed she was gently rubbing my leg with her foot which immediately got me rock hard because I have a foot fetish. She noticed the bulge in my jeans, looks at me and smiles and starts rubbing it with her hand. I don’t know exactly how it happened but quickly it escalated and she had my cock in her mouth and minutes later she’s completely naked and and we’re fucking hard on the couch. After a few minutes I was about to explode she shouted at me to pull out and cum on her tits! Afterwards she disappeared into the bathroom and when she came out she said I should leave and we should forget this ever happened. Problem is I can’t get it out of my head.