There are options that you might not be aware of:
MW is a disabled vet. Does she work? Or does she receive disability? If MW is under the 200% federal poverty level for a family of 2 ($30,000/2012), then SeaMonkey is eligible for SCHIP, which is medicaid for uninsured children. In OH it's called Healthy Start, MW can apply here http://www.jfs.ohio.gov/ohp/consumers/HealthyStart.stm. The way around the income guidelines is that MW applies for herself and SeaMonkey as a household, you should not be on the application. If MW has no income, just type her a letter saying you provide her housing and basic necessities. If MW/SeaMonkey qualify for the SCHIP program, it's more than likely they will qualify for WIC as well which is a great program-supplemental food and support to breast feeding women and formula/food to babies and toddlers.
Purchase a child health insurance policy from one of your local/regional carriers. They are more reasonable than you think for child only policies and provide pretty good coverage. RT had one of these for a while since her father's work coverage was not available here when he was required to provide coverage.
Federally Qualified Health Centers-these are federally funded community health care organizations located all over the country. They operate to serve uninsured children and adults and many provide comprehensive specialty care including dental. Co-pays are determined by ability to pay, generally ranging $20-40 per visit. I received care from one of these when I was a graduate student since we had a fairly limited student policy which did not include dental or extensive follow up care. I always found the care to be of an excellent standard and wouldn't hesitate to go there again. Here's a county by county listing for Ohio centers: https://m360.ohiochc.org/frontend/search.aspx?cs=635