Someone else in the thread has posted an article. They married in 2011, she completed highschool in 2007. She must have been 21-22 when she married. Not really a child (but also nothing tells us she is in for the money, obviously!).

Edit:

https://prospect.org/politics/how-republican-rep-john-rose-found-his-wife/ The article above reports she is from 1989, apparently.