Long story short, I got together with my husband about 10 years ago, we got married and have a wonderful child. We get on fine and all my family likes him. When we got together it was a bit awkward as he knew my previous partner pretty well, who then levelled some accusations about him. I didn't listen to him and asked him not to say anything bad about my new partner but looking back my ex was a level headed man and I don't remember him ever lying or making things up about people, i just thought he was upset. We've never really spoke again.
It's 10 years later now and I saw him the other day at a distance and it reminded me about all this and particularly that he told me that my DH was after my sister, had some intimacy with her and then moved onto me. I asked DH this at the time when we got together and he assured me it wasn't true, my sister said the same thing.
I recently asked my sister about this again who told me it wasn't true but I could tell she was lying/cautious about something. I then asked DH who got annoyed and just started criticising my ex but he seemed very bothered by this. Not like the usual arguments we've had.
The more I think about it the more I think my ex had something he was holding back. We were all in a friendship group and DH and my sister had been out together for drinks/dancing loads of times before me and DH got together.
It won't leave my mind and if he and my sister slept together, even if they were both drunk then I think I had a right to know.
I just don't know what to do, me and DH are ok but there's an atmosphere at home and I don't know whether he's annoyed at the accusation or worried that I know more than he thinks.