If she is "unemployable", she could go back to court and modify an order of support, which she would more than likely be set at paying $25.00 per month for child support (that is the lowest amount, the courts will allow, this is what people that do not have a job, of disable people will pay). You would have to check with your local state laws about the spouses income, I know that NY state does not use the other spouses income, but that's not to say some states may allow that. As far as pick up for the visitation, step-dad could pick them up,if it was up to her to do the pick ups, she would have to arrange other ways. Does she have Doctor's papers stating that she is "unemployable"? She will have to show them in court. Does she owe you back child support? If so and she is collecting Disability checks, you can have them garnished for back payments. Talk to your local family court and find out about this info.. Good luck to you!

