"Scully, you look beautiful." Which isn't what she's asking, and is treading dangerously close to things he can't say, but it's the first response that comes to him. "With a little finessing, you'll pass. Here, try some more stuff on, and I'll find you a picture for comparison."

There has to be something on his phone, one that's just Scully. (Any selfies with her will be damning, he's certain.)