In good and proper society with a family of means, I don't believe a wife would re-marry too often. However, out in a town, far removed from family...I believe a woman would either hop on a train back home to the East or re-marry for support. Short of turning a whore, she'd need some way to survive, unless her husband had been of considerable means.
In any case, without question it surely happened. So the chance of it happening is moot for the points of him writing a story. I say go for it.