Data from messages boards and public trees, whether on Ancestry and elsewhere on the internet, should be verified with documentation and evidence.
Documentation and evidence are the cornerstones of good genealogy practice. Knowing how to evaluate the data in the documentation and evidence is equally important.
In this case, let the paper you find write the story. Did Susan "Effie" Redman have siblings? One way to get a better idea of whether a story has veracity, is to research other family members. Her siblings would share her origin, correct? There is always a clue in the documentation of one of the other family members.