This is one weird story. I am confused. I woke up the other night just in time to feel someone getting on top of me. It was not who i thought. I woke up to my sister-in-law getting ready to fuck me. She rode me like no one ever did before. I don't quite exactly know what to do. My wife was out of town and she asked if she could stay over. I thought nothing of it, she has done it before when the wife was home. I never seen anything between us up to this point. Once she got what she wanted she went right back to bed without saying a word. I woke up the next morning and she had already left for work. So what do you think I should do or say?