You have creayed a problem for yourself buying 2 houses already, would be better to sell one now. There is nothing wrong with being married, as I am, but the wife immediately made a will at the Amphur that everything goes to me and not her children. That is the minimum you should require from her (knowing she can change it at any time without you knowing).
As has been mentioned above, you will have 12 months to sell after probate is granted but there will be problems with the family. I would not be staying long term in the house either.
On the other side of the coin if you have 2 houses to sell you should not have any trouble finding W4.