My mom just doesnt understand fairness? Family Problems?

You know, you should probably just go talk to her about it. Or if not, perhaps get more involved. Try asking questions or discussing things with her that require her attention and input. Maybe there just isn't much to talk about cause you don't open up so instead of silence and awkwardness she moves on. Maybe she is just trying to respect your privacy. Then she might be more understanding, and less reactive.