welcome to psychcentral.

Perhaps you can find something for Kimmy to do that allows her to share more of her stories without having to speak them to a T that doesn't "believe" she exists!

coloring, collages (cut and pasting magazine pictures and words) fingerpaint etc.

Reassure her (write notes she can find and read?) that she doesn't need to jump out a window when she gets scared... maybe find something that makes her feel more secure? (doll, book etc)

Some Ts refuse to accept the full definition of DID, and this is THEIR problem! But do keep in mind some mean it for very good reasons: they think that by ascribing actions "to another" you are not taking responsibility for "your" actions.

If you find, even after March, that you must stay with this T, try and discuss this further, with how their coping techniques can help you, who "believes" it is another personality. Gee, what a tough spot youmust feel you are in!