My bhabhi destroyed my brother's life and we don't know how to rebuild it. Need help?

Re: My bhabhi destroyed my brother’s life and we don’t know how to rebuild it. Need h

As far as I know my mum has no control over my brother, my mother has always pursued a policy of non-interference in her son’s marriage from the beginning, unlike the rest of us. She always used to say we should leave the matters of their marriage to them and when bhabhi was demanding a separate house my mother even asked my bhai to comply with her demands(this was the only time she ever interfered).

And my bhai has given my bhabhi things that he can afford, but bhabhi is never satisfied and is always asking for more. My mum even gave my bhai all the jewellery she had kept for my sister and my own marriages so that he could please his wife. When my brother objected, saying it was for our marriages, mum said Allah will give us more later when we have good niyyat. But bhabhi’s demands never end, her problem is that she just keeps asking for more and my brother, despite giving what he can, is always insulted by her. Its not like he just hands his whole salary to my dad. Bhabhi also consumes a lot.
As for my other bhai, he and his ex-wife don’t even live with us, he lives in Scotland for the past many years. So I don’t see how their case affects bhabhi.
I didn’t take the turn around first, it was she who started fighting with me for money, which forced me to end our friendship. I had hoped our friendship would grow stronger after we became sister in laws. But this is not the case sadly.
And the way my father has treated our mother has actually made my brother try to be a ‘good husband’. Please, read my previous posts and you will see that my brother said he did not want to follow in my dad’s footsteps.