I think t-girls like hetero men much more bec they feel like woman. But most of them don't like to be with girls in a sexual way. But i know a lot of t-girl playing in the with couples. And couples are enjoy very much they say.
it could be so interesting and very memorable experience for you and your wife. if i were you i would suck her cock with your wife at the same time, try new experiences with no limit. it will be much more pleasure for you and your wife and don't be addict
i hope and wish, my future wife will have fantasies like that