Amateur teen stepsister-in-law caught on camera using the restroom by my wife, leading to an impromptu sexual encounter

My wife and I were relaxing on the couch, enjoying each other\'s company, when my sister-in-law decided to take a walk. She noticed my wife\'s absence and decided to join her in the bathroom. Little did she know, my wife had left a note on the mirror for me to fuck her. I couldn\'t resist and ended up fucking my sister-in-law right there on the toilet.