It's understandable. You are the responsible one, doing everything you can to take care of your children. It's not easy though, and we could all use some help sometimes. But since you are trying so hard, your mother worries about your sister and directs her attention that way. It isn't fair. I don't know how it would go over to tell your mother how you are feeling, but maybe you can find a way to show her that even though you cope most of the time, you could use some help too.

Rap