I'm sorry you are dealing with that! I am sure she means well, but, in my opinion, perhaps she is going a bit far! LOL
I would just nicely explain to her what you said here. ..that you appreciate her and her willingness to help you, but that right now, you want to do what you feel you need to do.
90 in 90 is a suggestion. No one knows where it came from. It sure isn't in the book! no one should be coerced into AA, and no one should feel that way. Perhaps tell her you are feeling that way.
If she is working her program, she should have no problem with you saying so.
Oh, I am editing this to add: no you do NOT sound like an ungrateful brat! I like AA. It is working for me. But I don't like in your face AA people either. No one, especially newcomers (and I still am one!), should feel uncomfortable for any reason.