Even if others know, who cares as you (husband & wife team) are adding more resources to your family as whole. I just think her husband is very selfish, childish, and insecure with his idiotic reasons...
When it comes to my wife and I, we make about the same money but if she happens to find another job that pays more, I would say YIPPEEEEE!!!
Plus, I wouldn't mind sharing that info with others either like family members/friends/co-workers or even complete strangers...be
cause things like that make me proud as we are a team...