I assume something happened when he sought entry, I have never been asked more than 2 or 3 questions, where am I going how long who am I visiting and once how much cash I had on me, a few dollars.
What raised their interest, a very long visit?
You can’t marry your brother to get an immigration benefit any longer?
I doubt it makes any difference not sure many are impacted.
i would also question what did you expect to happen?
I would move heaven and earth to get the Divorce completed earlier.
She can hardly sign anyway as you are separated, you are not in a good faith marriage.