It's hard to guess how they're going to make this work. She doesn't want him to be a stranger to their son, but she doesn't want to endanger them-- or the work-- or the boy. Maybe from time to time he can stay, at least. She's not sure she can bear the thought of being completely without him.

But there's time-- plenty of time- in the future for worrying, and they've got more than their share of challenges. She's got no interest in that right now: not when she has so many beautiful, wonderful things to share with him.

"The earlier ones can be hard to tell. Now-- he looks like a little person. Fingers and toes and everything," she says, unable to keep the joy out of her voice as she absently sets a hand on the swell of her belly. It's not as if she's lacked support, or worried about taking care of William on her own-- but it's different, to have Mulder back. No one else in the world could have his perspective.