Hi, it's a really long story but in summary:
Met ex at work years ago, I also worked with my sister's boyfriend and he was friends with my ex (although not best buddies).
After 3 years together I caught him with another woman, a friend of his who lived with her boyfriend. He begged for forgiveness and I foolishly stayed with him, but a few months later he finished with me- his OW had split with her boyfriend and wanted him now. I was completely devastated by this, we had just bought a house together and I had given up a lot to be with him (moved away from friends and family, gave up my home, cost me about £30k). He moved her in 2 weeks later and they have gone on to get married and have a child.
Fast forward a few more years, I am married to my DH and have a little one on the way. Life is good :-)
BUT it irks me that my sister and her boyfriend are pally pally with my ex and his wife. It seems they are better friends than when I was with my ex, we rarely went out together but they seem to be spending more and more time together. If the shoe were on the other foot I would not be so friendly to people who did such a horrible thing to my sister. I can understand that her boyfriend is still friends with my ex but I don't get why she has to be so pally with him and his wife?
Her view is that they have not done anything to her and so why should she hold a grudge?
AIBU to think she should have some loyalty to me?
AIBU to still be bothered about this after all this time? (I mean it has been about 7 years!)