That we really don't know, if something is holding him back, or not. I only noticed that according to the article, he is 35 and she, 40. Meaning, he got married at 22-23, and she, at 27-28. I suspect, looking at the photos, that they have almost opposite personalities, and it is highly possible that they developed in different ways during their marriage.
His lawyer said that they had not yet applied for the divorce.
The reality? We don't know.
I wonder if the brother says "nasty divorce", it may not mean necessarily, "fight over the money". It might mean that the brother considered David's behavior "nasty", or didn't approve of the situation that led to the divorce, or didn't think highly of her husband. We'll see. What makes me question his involvement, although it is still possible, is the fact that they didn't have children. It means that after the divorce, they'd be free of one another. This being said, after 12 - 13 years, the property would be probably split 50/50.