Beneath the Bricker Barn

As they were excavating an old barn in Carville, Texas (fictitious place) they uncover the remains of a ne''er do well man who had disappeared twenty-five years earlier.The property is owned the man who is married to the former paramour of the deceased. To complicate matters, the wealthy owner without an heir and desparately wants one. Did he marry her to have her become an incubator and this possibility is raised during the earlier marriage. But what about the man entombeded in the concrete of their barn?