He smiles back at her, and if a few tears sneaked out while her face was pressed up against his shoulder, so be it. It's not like they've never talked about William or Emily before, but it's never quite felt like this. Somehow, it leaves him feeling relieved, baffling as that is.

"You're going to need some Gatorade to replenish your electrolytes if I keep making you cry," he says wryly, as he pulls his wallet out of his pocket, "but you don't have to picture a sonogram."

Sliding William's photograph out of its slot, he hands it over to Scully. After this, they're taking a break from the future-past, but this is the one and only chance he's ever had to show off his son's picture. That it's to his mother is immaterial.