Only a local attorney can give you good advice regarding this.
I highly doubt her ex husband is ordered to start paying again. The burden of alimony from their marriage stopped the minute she married you. His obligation has been met and it is highly unlikely he is ordered to pay again. He has nothing to do with this marriage failing.
There may be a loss of income due to this marriage and if she has a lawyer and you don't, you will lose. Your opinion that she is fit to work is irrelevant, she HAD this income and no longer does and you are already trying to end this marriage without trying to work through issues (counseling). It is a loss of income and you are not willing to try.