Yea, to be fair kids do change things. I also think some see themselves as a partnership whereas others consider themselves as individuals?
How would you view things if your wife made 3 or 4 times your salary and socialised with her friends regularly, while you didn't have enough left over to socialise in the same way with your friends? I'm not framing that as a rhetorical question, I'm genuinely interested in how you view that. Personally, I would feel marginalised and, dare I say it, unequal/inadequate.