Since this seems to be a hot topic, let's discuss:

How long have you been working with your current T?

How long did you expect to work when you began?

How long do you expect your work to continue?

Has your T ever mentioned the length of time?

Have you ever mentioned the length of time?
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For me, I have been working with my T for 8 months. When i began I thought I would get a little help with a family crisis and opened up Pandora's box.

I have no idea how long we will continue but I bet another year at least.

Neither T nor I have mentioned any length of time, it scares me.