He might be a sad bastard, but he's not stupid. She sets down her coffee cup, and he does the same - and she won't have to make the first move, because she's radiant in that moment. It's not hard to understand why Scully liked this house, seeing the living room filled with morning sunlight; it's beautiful, and she's beautiful within it, both of them spare and angular but shining with all the sunshine that can be had. No one could resist her then.

Mulder turns as well, not noticing the fact that his towel comes undone in the process, and he kisses her full on the mouth. She tastes like coffee, and without a second thought, his arms go around her. He wants only one thing right now, and it's to pull her into his lap and keep her there as long as possible.