Oh man. That was a lot of pressure for a guy whose track record with women had been shaky at best. Steve immediately decided not to think about the how; how he'd managed to woo Jean, how they'd gotten to a point where they'd had a child.
Andrew was there, right in front of them. He'd think about the 'what.' That, at least, was concrete and distinct, something he could handle right then. Baby steps.
"...you know, it's okay. I appreciate that you wanted to spare us, but you shouldn't have to sneak around and hide."