Namechanged as am known on here in RL. But regular I promise.
I work and DP is a SAHD. He's a brilliant, brilliant dad, and he's my best friend, and I love him with all of my heart. But we met in bad circumstances (he was married) and he has had to work very hard to build up my trust over the years.
DP mentioned the other day that he'd had a FB message from one of my workmates asking him and DS out on her day off. He wanted to be sure I was OK with it. I explained that I was a bit uncomfy because I know she's already been behind her long term (several years) boyfriend's back with someone else and she has a bit of a reputation as a maneater. And she's one of these men's women, IYKWIM - moody with girls, turns into a charming flirt the instant a bloke enters the room. I told him I wasn't telling him not to go and it was up to him - but he said he wouldn't.
That was the end of it but it then came to me that it was weird that she was messaging him on FB. He said he'd messaged her once in a friendly way and they'd been chatting a bit since then. If I was in her shoes I'd have asked me to let DP know if he fancied doing something. DP didn't think most people would see it that way.
Anyway, cut to the chase - I looked on his FB (I know!) and he started the conversation by messaging her about how lovely she looked one day! Totally inappropriate, undermining and - well, it's maybe none of that but I don't like the secrecy of it being something I was unaware of.
So what do I do? Come clean or try to feign ignorance and hope nothing comes of it? I feel like a cow for snooping but then it's mixed with anger that this reputedly platonic chatting has had flirtatious undertones. Another problem is that he will stand by it if confronted and insist that it's perfectly acceptable to secretly/privately and compliment another woman on her appearance - "like an angel" I think it went . Is that acceptable? because he'll say there's nothing wrong.
We've worked so hard on this trust thing