Sure you're due the commission.................just as soon as the transaction closes.
An unprobated estate is not a huge deal especially if the spouse is the only heir.
There is a 6 month period (may vary by state) in probate which gives any potential creditors a chance to present a claim against the estate.
For that reason any assets of the decedent (the dead guy) cannot be disbursed, i.e. proceeds from the sale of real estate.
HOWEVER, there is a way around that.
Real estate can be transferred before the time period is up if the title company agrees to hold the seller's proceeds of the sale in escrow and commissions and other routine costs of sale can be disbursed.
I know this works in Tennessee because I have done it on several occasions.