They're kids themselves. Hopper knows Steve is saying he doesn't want kids right now, but he thinks back to when he was twenty or twenty-one and he knows he hadn't even been considering that.

But then, he'd been shipped off to Vietnam right about that time, so he figures it's not much of a shock he hadn't been thinking about starting a family. Maybe it's a good thing, that Steve has the space and capacity to do so.

"Shit," he says. "So are you mad at her or is she mad at you?"

It's a question he needs to ask so he can work out what sort of advice might be expected of him here.