Seeking Potty Training Help!

Okay so I have a potty training dilemma. So when Kassi is with me she is close to 90% potty trained, I say 90% because if she is really busy playing and distracted we may end up with a wet pull up and she has only stayed dry through the night two times, but I've only had to change two poopy diapers in the last several months. Now when Kassi is with Grandma or just with Wes she refuses to let them know when she needs to go and usually refuses to go in and sit on the potty for them.


I am at a loss. Part of me thinks that she is not completely ready and doesn't have a lot of control yet. She does tell me when she needs to go, but I do also tell her let's go use the potty, which Wes and Grandma do as well. When they say it though she often times will throw a fit and not even go into the bathroom. I really don't know what to do. I don't know what I do that is so much different. So any advice out there?