Hmm. Doesn't pass my smell test.
Stockholm Syndrome may play a factor also. Any number of things could have happened that don't necessarily constitute willing accompaniment of the convict.
The phone calls to friends and family and particularly the promise to the children to "see them soon," as well as the rigidly-controlled duration of the phone calls implies something other than an affair gone awry.
She may have resisted at first and then grew to accept and empathize with her captor. On the other hand, she may have helped him escape, though granted an assistant warden's wife could be a valuable tool by a kidnapper to get off the prison grounds undetected.
If there's any fish in this story, the detectives interviewing both parties will ferret it out, and I'm sure it will be sold as a book or a magazine story in all of it's lurid details.
Hell, it's a story that will sell regardless of whether her story is true or not.
I think it's important to get more facts before passing judgment. Suspicion is natural, but if this woman really is a victim, she deserves sympathy rather than scorn. Long shot or not.