Hm. I wouldn't trust enough in any promise of "anonymity" to post a question at all.

Or - I'd be sure that my T would recognize me in the question. Then I would waste time on whether she might wonder at, or even dislike, my going outside the room to lay the question before a lot of other, unseen, unknown Ts. (*)

Just speaking for myself, better to try to ask her directly, if something has to be asked, even if really really hard.

(*) I'm not sure she approves of "going outside the room" even to the extend of PC; whenever I have mentioned it (just twice, in a veiled way), I see lots of questions in her eyes, but she has never asked them or tried to dissuade me from participating here, which I am glad of.