Well, first off, glad to know you're doing better neutrino and that you finally found a good T.

I would not like to share T either in your shoes... And yes, I would feel very selfish too.

But seriously, even your T might have a problem seeing an acquaintance of yours. I think Ts check comfort levels of the client who was here first and refer the other one. Could you discuss this with your T and get a referral for your acquaintance?

Besides, your T being a good fit for you does not necessarily mean they'd 'work' (be a good fit) for someone else. Food for thought (which might also lessen the guilt you feel).