Most of the information on her children is on the Rootsweb's WorldConnect Project.If you can't find it there I'll post it.
It doesn't have her will or death date.Her will is in Greene County, Ohio and was written 13 November 1845 and entered in the March term of 1846.Her husband died in 1837.His will is in Rockbridge County although he died in Greene County.
She names children:David, Mary McCroskey, Jane Williamson and the rest of my children, male and female.
That was about as far as I went since this Mary is not the same Mary I was looking for.
If you can't find this on Roots Web let me know and I'll try to send it.