Grandma watches my daughter and won’t do what I ask

My mother watches my daughter. We pay her and I’ve transitioned from EBF to ripple (pea protein) baby took it well. I’ve also transitioned to 3 bottles a day. My mother will not let me take away her bottle to Sippy cup and wants to feed her milk all day. She just barely started eating better she used to just spit out food all the time.

Just frustrated with her not allowing me to do what I think is right for my child.

I’m also trying to take away the bottle association with sleep so we can brush teeth and not just fall asleep after each bottle.