Background before story starts. So I'm over at my inlaws house visiting (they live 5 hours away) we stay with them instead of getting a hotel just easier that way. I always close the door after leaving so my wifes family stays out. We sleep in my SIL room (F19). I will usually head up before everyone else and get ready for bed and just stay upstairs while people still talk downstairs.

I head upstairs to the room we are sleeping in and the door is shut per usual. I open the door to my SIL changing since it is her room. She was completely nude. She is 5' tall 115lbs DDD's tits very pink nipples and a nice round ass. I just stood there in shook looking at her. I know she saw me we made eye contact and she just continued to get dressed. She didn't cover up or try to hide anything. I just slowly shut the door after the image of her nude body was burnt into my brain.

She has never brought it up to me nor has she told anyone (that I know of). When we are at I'm inlaws everytime I see her I just picture her naked. Ive even jerked off thinking about her. (I don't have picture even tho I wish I did). I know I'm wrong for thinking of her I just can't help it. Ive wanted to try and brush up against her or have a way for her to feel my buldge just can't seem to commit to doing it.