I'm going to go out on a limb and take a slightly different approach to this question.

 The property, having been acquired during the marriage is the property of the marriage, unlike a lot acquired by either party prior to marriage.  The couple has paid property taxes into the tax collector for years or more from their joint marital funds.

   The husband dies without a will and he never quit claimed the property to the wife in the title records. 

  His heirs who are his children have an equal (to each other) claim to his estate.  Unless a probate court has ruled on the matter, then his interest in the property via his estate appears to be an ongoing matter