I mean, he’s got the spirit? Is this chaotic neutral?
You might have a point looking at the state of society and the legality of that action in their country. But without any of that information it looks like their just serving their and their own’s best interest which would fall under the neutral category in DnD. Thus we see why alignment charts suck tarrasque balls.
I’d say if you get married in a place with alimony, then you do ethically owe your spouse alimony in the case of divorce. Part of the understanding under which the relationship commitments were made.