You can't make life decisions like this based on a poll.
Sounds to me like you need to be working with a therapist on your own to figure out yourself and what you want in your life.
No one here has a crystal ball--heck, we try to figure out whether our own partners' recoveries are for real--couldn't presume to guess whether some stranger's is. All I know is that some people do recover and others don't. And it's not always possible to tell whether it is lasting or not. My first husband is still sober after 37 years. Second husband went back to drinking after almost dying of it. I'm eight years sober and don't intend ever to drink again. I can be pretty certain of myself and of my first husband, but beyond that it's anyone's guess.
All of life entails risk. You will continue to have obligations toward, and rights, with respect to both of your children. I hope you have a good lawyer--whatever you do, you will need one.