Thanks for your response Lost. The situation is complicated by the fact that just a couple of weeks earlier, T's supervisor went on bereavement leave! So T is seeing a new temporary supervisor who obviously doesn't know her story, and has likely just accepted T's assertion that she knows her own limits and is okay to work.

I guess I have to just see how it pans out. I'm really conscious that I am probably 'overthinking' the whole situation, but that's how I cope with the unexpected, by trying to foresee and think through every eventuality! Even though I know that isn't realistically possible...