Soo...I am not going to offer any advice because I am in the same place as you!! I do not identify as being transsexual...just a crossdresser who loves womens clothing. It is however a major part of who I am. My wife gave me an ultimatum about 3 weeks ago now I guess that pretty much said...continue and get out, stay and stop, or do it and know that every time you do, it really hurts me. I can't intentionally hurt anyone regardless of who they are so that gave me two choices.
Like you, I have stayed for the kids. Its the toughest thing ive ever had to do, not crossdressing. It is so ingrained in me. I had to give up my wardrobe to her and let everything go. I'm scraping by for the time being until I can get counselling for myself and marriage counselling. On the path I am on now, I foresee disaster but its what I had to agree on to keep some peace for if nothing else just a little while longer.
So yes, I totally understand the position you are in completely and sympathize with you 100%. Hang in there gurl well make it...one way or another.