Is there any way to set up times to call/skype your T when your H is NOT around? Or, when she calls you, can you just take your cell phone and go for a walk, so your H can't listen in? You have the right to leave the house, go outside, go to a park, go to a quiet public place, etc. in order to have your sessions away from your H. And, given that your T is the only T you feel comfortable with, it seems finding a way to create privacy with your T via skype/phone might be the best option.

For me, when I've been out of town and arranged phone sessions with my T, I've simply taken my phone, walked out the front door, found a quiet place to sit down, and talked to her from outside. That way, whoever I'm on the trip with can't hear our conversation. In fact, my first phone session with T was one of our best sessions ever!