I'm going to try and shorten as much as possible. I have 2 close friends. They were best friends for 10 years until 6 months ago, completely inseparable, never went a day without speaking etc.
Friend A is 15 years younger than friend B. Friend B has grown up children.
Friend B has a son-in-law the same age as friend A. There has always been an obvious spark between A and sil which has been an ongoing joke even with Bs daughter.
Long story short, A admitted to B that her and sil had kissed on a night out.
B and her family have made a HUGE issue, slating A all over our local town. Sil has been totally forgiven (I happen to know he has made several passes at A over the years which she has turned down)
A has been very quiet. Accepted she did wrong, lost her best friend etc.
My aibu is: B has said she can't be friends with me if I'm still friends with A. I don't want to lose either friend and, imo, if sil is forgiven surely A should be as well?