She is the daughter of the embodiment of betrayal. That transcends genetics, the Yozi aren't flesh and blood. She also has contact with a turned Scarlet Empress for a mother (Rihaku mentions that she wants to best her, or would use Ambition to do so, I believe), she has experience with betrayal. If it would serve her purposes, I have no doubt she would betray us. We're not exactly close friends.
I want her to betray us. I want things to begin to go poorly, so we have impetus to get out there and actually do things. Right now we are taking the slow and safe option every time, our biggest risk was... staying where we started, under the shadow of the most powerful terrestrial exalt still around.