It's important to try to mend family relationships
John has a bad argument with his sister, and they don't talk to each other for a long time.
John wants to contact his sister about their argument.
John tells his sister that they should move on from their argument.
John tells his sister he can't forgive the things she said during the argument and tells her not to contact him any more.
John's relationship with his sister improves and after some time they forget about their argument.
John's relationship with his sister becomes very cold, and they are never very close again.