CH - Please seek legal council. Just because you go doesn't mean that you agree to getting a D. A lot of attorneys offer a free consultation. You can go to be advised of your rights and how D works in your state. You can tell the lawyer that you do not want to file. A lawyer can also advise you whether you can delay a D if your W decides to file. You do not have to tell your W you went to see one.
MLCer's are notorious for spending money and running up debt. If you don't want to be responsible for any more than you already have I suggest you get the financial sitch figured out. If you are on joint CC get them separated and into individual accounts.
This will be a long haul. Protect yourself and your children.