I don't think that woman is a tranny. I think she's a natural born female. From what I've read on boards like these about Nacho, he doesn't actually touch the tranny in the scene, he goes out of his way not to, but the girl in the scene with him does the "taboo" work. If this is from one of his tranny films, my guess is the tranny is in the background somewhere.
And leave Nacho alone, I love him.