Sounds difficult to me; if you knew why, you wouldn't do it? I don't think whys can be concluded out of thin air like that.

I would look at the statement and repeat it to myself a few times and see what feelings and memories come up.

For me, the "We" and the "need" implies I'm in there, part of it, but I didn't make that decision? I don't need to end on time, lady T, YOU need to end on time

However, that being my first reaction, I also see the double meaning of "we". T and I are in this therapy thing together (or at least T feels we are). How would you have felt if she had said, "I have another obligation this afternoon, can we end this session on time today?"

Depending on how she actually worded what she said; there's a lot that smacks of my stepmother's controlling and "in charge" type of wording where I didn't get a vote. Yes, one does not get a vote in therapy; the therapist controls the length of the sessions because they are "appointments" with her and we're paying for her time BUT, using "we" and "need" together, implies that I know what is going on and am feeling the same way as T and that's a bit high-handed?