I asked you about your siblings because even when you have a bad relation with your mother, it doesn’t mean you can’t get well on with your siblings.

These kinds of things happens in many families.
Maybe your older sister has a similar character and personality to your mother and they are in the same vibe while you feel apart. It also happens a lot.
How do you get on with your other siblings?
I’m sorry what happen to your brother and how he was perceived. Sure, you miss him a lot.