(((((((((((((((((( hugs to you tree )))))))))))))))))

>> I have such a good relationship with T, and I don't want some stupid hurt feral child part of me to come along and ruin it. I don't want her big big feelings.

would it help you to remember that T has already met her? By now he has met all your parts, and he is OK with all of them.

Please don't worry so much. He's trained, and he is very good at this work (very!) and he cares about you.