My and my DB are fairly close, I'm in my 20s, he early 30s. Both still lived at home until recently so saw each other a lot.
Around two years ago DB got a new girlfriend. She's not who I would have saw him be with and is nothing like who he's been with before but she seemed to make him happy on the whole. I've witnessed usual couple spats, she's very bossy imo but he never stays too mad at her for long. I have had a weird feeling about her but I don't get involved, I've still made her feel welcome, invited her to birthday meals, parties, shared a bottle of wine with her when she's stayed round our parents house etc.
He moved in with her recently and we're seeing him less and less, he packed his full time job in and just stays at home with her, she doesn't work either. She has a DD who is around 7 and DB isn't too keen on being a step dad figure. He enjoys the nice times they have together, days out and such, but leaves disciplining/coparenting between the DD parents to them so we see him when there's usually an issue going on that he can't be bothered to be apart of.
Anyway, this weird feeling I've had about her has now materialised when an old family friend has reached out to me to tell me she's putting it around and she's advertising herself on sex sites (Fab). He's showed me her profile and it's quite disgusting and graphic. Now I don't care what anyone is into, as long as it's legal of course, but the things she has wrote in her bio about my brother is crazy.
She's worded it as if he's fully aware and happy for her to play away. I can't imagine he does like that but obviously I don't know the ins and outs of his kinks, nor do I want to.
My AIBU is do I bring this up to the pair of them? I really don't need to know this info if they're both getting some kind of kick out of it but she has said she needs discretion but anyone who knows them can spot them on this profile a mile off. There's also a lot of graphic images of herself on there which cement who it is.
Do I let them know that I know and tell them that they need to rain it in/be less bloody obvious? Our parents would absolutely die if they found out but by the sounds of it, it's doing the rounds in the group chats.