I have a few siblings. One brother is settled abroad for over a decade and he has a wife and child. Let's call my brother and wife A and B for this. Another brother, I will call him Z for this.
Z was at home for years and he was in a bad patch at home without work for a few years.
A and B invited him to where they are. A and B set Z up. They gave him a room in their back yard, charged him rent and sold him a car that they were finished with.
A few short years after Zs departure and some things developed between Z and B.
B wasn't happy with the length of time that Z stayed in their back yard. B wasn't happy when A and Z enjoyed some drinks together. Drips and draps came out on phone calls from Z to our mother. Bad made things difficult for Z when all A wanted to do was help his brother. There was a week where B announced an increase in Zs rent without any notice. He was paying 300$ a week and it was increased to 400$ a week.
Z had to move. He found a place to rent.
B is now claiming damage to some of her property mainly her Garden from when Z was there. B is demanding for money out from Z. The damage is from an engine leak onto grass. B is withholding some of Zs things as ransom for money.
Now, what is happening at home is Mother-in-law terrority with my mother furious at B for giving Z a hard time. Not only furious but pure distain.
I advised my mother that this is all between them and there's no need for an extra layer of rubbish from this side. I have an opinion that whatever it is, it will be sorted and ironed out eventually between them all but now my mother knows about it there will be no give and take and no going back on any of this with my mother. She will be like a dog with a bone to pick.
I always liked my sister in law too. I always found her to be down to earth and organic.