I periodically check the Dement Forum here and am happy to answer your question. Dennie Marie Schmidt is my second cousin (same great-grandparents) and I also have this information on our dementtree.com website.
I know her younger sister Deborah better (who lives fairly close) and never knew Dennie Maree very well, though they came to our annual reunion several years ago, and as far as I know they're all still with us and doing fine. I somewhat remember them being in Devine, west of San Antonio, but don't know where they are now.
Her line from Charles (Cader's father) is Charles Dement, Charles Gilbert Dement, Ruben F. Dement, Edward Harvey Dement, William Harvey Dement and her father, Dennis Dement. Your second post is correct, with her name Dennie Maree Schmidt and married to Francis Schmidt.