A close friend of mine is a brand new provider, and I would like her first few sessions to be doubles with me so that she can get started in a safe environment with someone she knows and trusts. I'd also like to offer them consistently because we enjoy playing together! I'm wondering about the feasibility of this, though, because she's TS. Is there crossover between the guys that are into TS girls and the ones who are into 'genetic girls'?  

A question about rates, too: would it be wise to incorporate a small doubles discount? Is this something that is done between providers that work together often?

...GG but I've never seen a review of a "mixed" doubles couple.