My guess would be stretching in the leg she wants to improve. I have done this many times and stretching would be the best way.
You can go into a split and then lean as far forward as you can.
Another one is to when in the split grab your toes and pull up,stretching near the actual foot which then gives you more of a chance to lift your leg higher.
Because it’s the lack of not feeling wanted
Answer:
use assertive language and body language
Explanation:
using assertive language can tell people your not okay with that and if they don't stop see an adult or trusted person