This sounds like exactly the kind of situation that R.D.Laing often wrote about:

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T shares that he perceived MUE as distant.

MUE denies that she felt distant.
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It's tempting to jump to some kind of conclusion here:

• "He's the T, so he must know; and MUE is the client, so she must be blind to whatever's going on with her."

or:

• "T was feeling distant himself and was projecting it onto MUE because that was the most convenient way to put it out of his awareness."

I don't think there's any quick and easy way to tell whether one of the above is any truer than the other. I prefer to "live in the question," notice what happens next time something like that comes up, and see if a pattern emerges. MUE, maybe you'll eventually notice that you do sometimes feel distant in that group -- or that others tend to perceive you as distant when you're actually some other way. Maybe, on the other hand, after a few gentle reminders T will start to notice that you're not the only client he projects stuff on -- or others will pipe up with, "I think you did that with me, too." Those are not mutually exclusive, by the way.

Good luck!