My brother is not a nice person.
He can be verbally abusive, he's up his own arse, makes sarcastic, derogatory remarks and is definitely a narcissist. Aside from all of this our kids love each other. I do keep a distance however and don't have to see him too regularly.
I then discovered this week that he has stolen money from our father over a long period of time. Not a huge amount but in the mid hundreds. He has lied to our dad that it has all been a big mistake and dad has believed him. But my mother already knew about the money being taken before my dad found out. My brother accidentally let slip to her that he was using my dad's credit card to buy things. DM and DF are divorced. Mum assumed it was all a big joke at the time, my brother has a weird sense of humour, hence her not saying anything until recently when my dad happened to mention at a family gathering that someone had been using his credit card through uber and other sites. My mum immediately told him what my brother had said as we were all stood together. My brother was elsewhere at the time.
After mum urged him to tell the truth my brother has now admitted it but has made out it's all a big accident and he "used the wrong card details" which my mum now knows for definite is a big lie. He is also saying that my mum is lying about what he told her about using dad's card in the first place. My dad just seems to want to believe him despite what my mum told him at the family gathering and despite my brother withholding this information even after dad had told him his credit card had been used.
I have also discovered that my brother has been to our grandmother to ask for £1000 towards basic living costs saying he couldn't afford to get work done on his car. However, he then went and booked a holiday abroad.
I can't afford a holiday abroad this year and just accept it. I don't go asking for money.
These issues obviously have nothing to do with me, but I don't and can't condone his actions either. I just have no time for him and I'm finding it more difficult to be around him. But I feel torn due to the childrens relationships and my relationship with his kids. If I try to speak to him about the issues, he will undoubtedly become abusive. I don't want to put myself in his firing line, but also don't see why I should pussy foot around not saying anything for fear of his nasty eruptions. He's said some nasty things to my mum, all for telling him to speak up and tell the truth to my dad. My brother is in his late thirties but often acts like a spoilt teenager and accepts zero accountability.
I know it doesn't directly affect me but I think his behaviour is atrocious.
What would you do?
How do I continue any sort of relationship with him?