My T throws personal info in here and there. She knows im not interested but she uses them as an example "This happened, then I felt this, then I felt that, then I thought this, then I behaved like this" etc. She sure is an overthinker in her private life! But yeah maybe just say "I have a question.. ofcourse you dont have to answer it and thats fine but curiosity is KILLING me so I have to at least ask!" and put it in a light hearted way. If she doesn't want to answer, its not because of YOU, its just the rules. Don't take it personally! Its just the rules of the game, so to speak.