Brother was caught messaging another woman.
Apparently nothing went on but they have history prior to him being married.
The complication is that I know the OW, and was friends with her. Not massively close, but quite close.
I still have her on my social media and she sometimes comments on my posts but I feel a sort of loyalty to SIL who hasn't done anything wrong.
Do I delete her? Delete her and explain why? Leave her but don't respond? Continue as normal? I feel very conflicted.
I am so pissed off with my brother and her. Feel very awkward.