I'm in the middle of a messy divorce, in court in Jan to try and sort out the finances. Basically my ex refuses to pay spousal and child maintenance at a level that means we can manage. He carries on paying the mortgage though, only missed a few payments. Also bought a new car although he denies its his.
Starting point is fifty fifty equity for the house. The partner left with the children gets a higher share, to provide a house for them. Advice is right, take it step by step.
Also think the one who leaves and has the higher income, says an awful lot of things to the partner with the lowest income. I was told repeatedly by my ex he would be getting custody, even after our middle son was 18. Now he usually sees our sons for an afternoon a week. Thats at most. Half term this week, theres a chance he'll ring our sons late morning one day, and ask if they want to go out for the day. Only a chance though.
See your solicitor, ask all the questions you can think of. You'll be paying for the hour, so make the most of it. Afterwards, don't ring or email to ask single questions, wait till you have a few. You'll be charged the same amount!
You're not a mug at all, like most of us with husbands who walk out after a lengthy marriage, you're the one whose kept everything going, for years, your kids will know how much you do, your ex will never acknowledge that.
Know its hard, but have as little to do with your ex as you can, then he can't say things that upset you.