You shouldn't cut your sibling out of your life.
Jill's brother does something that she thinks is terrible, and she's very angry with him.
Jill wants to react to the terrible thing her brother did.
Jill says that even though she disagrees with what her brother did she will stay in his life and try to help him make amends.
Jill says that because of what he did she will never see or talk to her brother again.
Jill's brother is glad that Jill is standing by him even though he made a big mistake.
Jill's brother is very sad that his relationship with his sister has effectively ended.