Stupid actually does hurt! A lottery ticket is a bearer instrument meaning it is the property of whoever is holding it up until it is cashed and the holder gets the cash. The first thing you do when you have a winning ticket is sign your name on it. That way it isn’t a bearer instrument.
If he wanted to let her claim it he should have had something written down and signed before he gave it to her. The lack of ID and bank account could be rectified in a couple of weeks after which he could claim it himself. His best bet would be to kiss her ass and give her foot massages while telling her how beautiful she is. Once he pissed her off it was game over.
He just spent $5 million proving she didn’t love him.