Sorry this might be long but I need to give a bit of background!
I have never really been a massive fan of my bil as we have nothing in common, and I don't find his jokes funny, he's arrogant, selfish, chauvinist and stubborn. But alongside this he has also treated my sister pretty badly (books holidays for himself and "the lads" without telling her until last minute (once when she was 8 months pg!), and she is constantly finding girls numbers and suggestive texts on his phone). I have never made my feelings about him known until very recently - they have been together approx 10 years and have a 2yo ds.
Recently she found that he had been on a dating website asking for no strings sex with an older woman plus various messages about meeting up- she was devastated and rang me up in tears saying that she was leaving, had packed up her stuff and was at our mums. I tried to reason with her and say that it could be a joke, or an explanation could be made so she must talk to him first. They talked and he said it would NEVER happen again and he was sorry so she went back home, but 2 days later there were more messages from a woman so she said that was definitely it and went to my mums again. I spoke to her and told her a few home truths along the lines of "you are too good for him, you can do better", and that no-one liked him. Wrong I know, but I was very angry that he had treated her this way. She moved back in within about 12 hours and they seemed to just snap back to normal which I found very odd and was worried for my sister.
I then got an email from him apologising for how he had treated her, but done in a very fascetious(sp) way and also telling me that I should have kept a lid on it and not twisted the knife in.
At the time I was literally shaking with anger so I replied telling him that he had no right to tell me what to do and that he was a philandering idiot and that my sis would have a queue of men lined up if he wasn't around.
Anyway this was weeks ago and there had been no direct communication since, however I keep getting my mum coming on the phone telling me that myself and my dp are not perfect and that she knows things about him (that I have told my sis in confidence, but she has now divulged to my mum in a tit for tat way).
I am getting married in 5 weeks and bil said he is not coming. So I texted him and said "Please will you come to our wedding for my sister's sake as she would be so upset if you couldn't be there, there will not be an atmosphere". I received one back saying he was not coming as I am a shit stirrer, a hypocrite and that I got involved in something I knew nothing about, and that he didn't have the time or energy to speak to me. I have apologised to my sister for the things I said in anger to her about him, and I have said I will be civil to him, and even act as though nothing has happened, but I will not apologise. Now my sis says she will not be my maid of honour anymore and is not coming to wedding either.
I had my mum in tears yesterday saying that she wanted to jump off a building and that her family was splitting up. She actually looked ill.
So now I am thinking that I should apologise to him, even though I don't mean it, just to smooth things over for my mum and sisters sake.
But I just can't stand him getting what he is demanding - I feel like I am giving in to a blackmailer.
If I was in his situation, I think I would be going out of my way to do everything I could to make my wife happy after the distress he's caused her, but he is just making her make a horrible decision.
So what do I do?
Sorry this is so long - thanks for reading!