A lot of us got married and had kids, trying to make the best of things, not truly knowing why we felt the way we did, not knowing the name of what our feelings were called, not knowing about transition. We didn't get married in the hopes the feelings would go away (I didn't anyway), we didn't get married with any intent to deceive; in my case I was trying to make the best of the cards I was dealt, and tried very hard to fit the female mold. All of my pics pre-transition are totally feminine -- I was not butch at all.
I'm lucky in my case my marriage dissolved well before I discovered that all those feelings and thoughts I'd had since childhood; that I was supposed to have been male from birth, made me a transsexual, and transition was a 'cure.' I'm sure my marriage would have ended also, not when I came out, but as soon as decided to transition.
I feel for you. But understand that if you try to fake it until you make it, you may not be successful (I know I wasn't!). And what kind of example are you setting for your kids if you are not true to yourself, that you are denying who you are, which is a woman? It's not easy, I know, which is where therapy comes in.
You're not alone.
Jay