She has made a mistake.
She thought that she knew everything about him.
The man she knew was open to new people, brave and not shy in new situations.
Last week a new bar opened around the corner.
He said that he didn’t want to go.
She couldn’t believe it.
She convinced him to go.
She was the only woman in the bar and all the single men in the room appeared more shy than my man.
He crawled up in her lap, to afraid to make contact.
She was immensly surprised.
She realised that she couldn’t rely on him always acting in the same way, the way that she knows him to.
So he can change, too.