What did you fight with your siblings about?

My wife is having terrible discussions with her siblings about how to divide up their mother’s belongings. It gets into who did what for their mother, and whether there will be an inheritance (she’s in a nursing home now), and how things should be divided up given who has borne the brunt of the care-taking. There seem to be a lot of hard feelings. My wife is not getting along with her favorite sister at all.

This made me wonder about whether other people have had a really hard time with their siblings, and if so, what the disagreement was about.