Welcome! Thank you for your question.
The most recent will, so long as it meets the requirement for a will under Arkansas law, is the valid will. Generally a subsequent will first states that it revokes all prior wills, this would revoke the will that the wife has.
He cannot fully disinherit his spouse. If his most recent will leaves his spouse less than 1/3 of his estate
then she can make a claim for at least 1/3 of his estate.
As for his house, the deed would not pass under the will but was fully owned by the spouse at the time of the quit claim deed. Since the mortgage was in his name alone it is a debt that must be paid by the estate. If the estate does not have sufficient assets to pay the mortgage then the spouse must take over the mortgage to keep the mortgage company from foreclosing on the house.
I cannot provide you with legal advise. I have provided you with information about the law related to your question. My answer, and any information that you find online, should not take the place of having a consultation with a lawyer in your area to advise you regarding your specific issues.
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