Seeking advice about discovering a past incestual relationship.
Hi, I have a difficult problem that I can't discuss with friends or family, so I thought I would ask anonymously on the internet.
About 2 months ago my boyfriend gave me his old laptop when he bought himself a new one. About a week ago i deleted a file by accident, so I went to the Windows trashcan to get it to back, and found 100s of pictures in the trashcan that my boyfriend had deleted. I started looking at the pictures (and a few videos) and most were old family pictures, some were as old as 10-15 years ago as he was growing up. Many were pictures I had not seen before, so I started looking at them. Then to my surprise I found some nude photos of his sister when she about 11-12 (about 10 years ago), she was posing for the camera in a playful way mimicking as if she was a nude playboy model. My boyfriend would have been 13 because he is 1 year older than her. Then I found a video where she is only wearing panties he is asking her questions about what she thinks of sex, she giggles a lot and says she likes having sex; they talk about sex\puberty\etc for about 5 minutes and she comments that it is funny how he gets erections all the time. Then the video cuts, and is pointed at the bed, where they both are nude, and proceed to have sex. I stopped watching at that point and have not watched rest of it.
This was very shocking to me because nothing about him or sister suggested anything like this. I have known my boyfriend for 3 years, and we are unofficially engaged. we have talked about getting married but not set a date. I've become close friends with his sister and I want her to be one of my bridesmaids at our wedding. My boyfriend is very close to his sister, they almost seem like twins that love to do things together. When she graduated from High school, just the two of them went on a 1 month trip through Europe. They've done lots and lots of things like that, just to the two of them.
Should I just delete the pictures permanently and never say anything to my boyfriend about having found them, or should I let him know I found them? It does not change my feelings about him or his sister, just shocking to know they had a sexual relationship in the past and it currently doesn't seem to bother either of them. In the video they were both pretty young, and it was clear they were both liked having sex with each other. I don't know how long they continued to have sex together, but it does make me wonder because they have such a close relationship now. She is old enough now that if she felt he had taken advantage of her, she wouldn't have such a close bond with him.
Should I talk to my boyfriend about it, or just pretend I never saw the pictures\video? Part of me wants to discuss it, but part of me is afraid it will open up a Pandora box of secrets they never wanted to share with anyone.
Does anyone know how common it is for siblings to do things like this when they are younger?
THanks