She must wear a long skirt that covers her body and then she must wear the abaya on top of that.

I have a friend, and Maasha Allah she tries so hard to be a good Muslim. And its working except one thing, she wants to wear skirt/abaya, but her mother does not let her. What should she do?She wears abaya, but an argument happens when she does, and whenever she wears a skirt as well. And today she should be going somewhere with her school. And her mother isn’t letting her wear the abaya/skirt. And it upsets me so much because I dont know what to do. I want her to enter Jannah. But she must be covered head-toe, without showing her figure.