This is a HUGE fear that I have too. My partner has just recently come out (even to me) as a transwoman. We've been together 4 years, married for 2 and I knew she struggled with gender identity for quite a while, but she only said she was honestly transgendered a month ago. Maybe she's just now comfortable enough herself to openly admit it. Even though I've been veey supportive, her past partners saw her as a "weak man". She knows I will not judge her for it, and be as supportive as I can. But now She's gone fully into wanting everything done right now and I'm still trying to process the whole thing. We also have 3 kids between us (for our previous marriages) I'm not sure how to proceed and I'm honestly terrified that I've been used to make her confident enough to come out and now she's going to leave. It's very nerve wracking. She hasn't had any affairs, but now she's texting day and night with someone I don't know and I'm increasingly uncomfortable with it.

I really hope your wife doesn't do this to you, especially if you've been caring and supportive. It's just a terrible thing to do.