Hi! Regular poster here, name changed as this is quite specific.
Dp and I have friends that we socialise with every couple of months.Helen and Nick. We're all late 30's.It started out as a friendship between Helen and I at a sports club but now we're equally fond of both although I wouldn't call them close or best friends.
Last week Helen suddenly asked me to go to a large social gathering related to the sport. I was surprised as it's not my thing, but agreed. Fast forward to today and travelling there she referred to me as her wing woman which I thought was odd but brushed off. What followed was a day of Helen basically on the pull, chatting to and flirting with most of the day to a man, Pete, whom she told me she had a "thing" with at the same event last year. I made it very clear that I was uncomfortable, told her how lovely Nick is and how it could destroy their marriage. Eventually she appeared to agree that it was a bad idea and it was time to leave. We walked towards the exit hand in hand then as we approached the exit she asked if I wanted money. I said "no" puzzled then she pulled away, said "if Nick asks I left with you" then disappeared into the crowd presumably to find/meet Pete.
Although I THINK she is after a flirtation/snog rather than a full affair, I don't know for sure but either way I'm not ok with it.
So, AIBU to back off from the friendship, firstly because I don't approve of her blatantly going on the pull when she's married but secondly because she knew I disapproved and was fond of Nick and yet still managed to implicate me in it?
What would you do? Help much appreciated. Thanks!