My s****r Likes My Naked Pictures SeXStoRY

Ok now this is a 100% true story. You don't have to believe me but there is no weird i****t stuff or anything, well not quite... My husband and I like porn. As such we take a lot of personal pictures and we keep them on our laptop. Nothing too unusual about that. I also have f****y come to stay a few time a year and during one visit by my younger s****r my husband noticed the 'recent documents' was full of some sexually explicit pictures of me and they had all been viewed after we had gone to bed but my s****r was still awake. So he checks the logs and yep, she had spent the last few nights looking at photos of me masturbating and doing various other non PG rated activities. We thought about hiding the pictures but I admit I was slightly turned on so we left them where they were. Next visit and she looks at them again. Visit after that and she has brought her own laptop with her. I shouldn't have done this but we did a search on her disk for pictures. Not only did we find some of my pictures but also several dozen of her that didn't leave anything to the imagination. The thought of this was very odd, both wrong and yet so erotic. We left the pictures of me on her laptop and took a copy of hers. it was only fair after all...