River smiled as she heard him humming in the shower, rolling her eyes fondly. He really was ridiculous. Slipping off her nightgown and letting it fall to the floor, she silently walked to the shower, sliding into it behind him, nudging him out of the way of the water. "At this rate, you're going to use all the water, my love," she hummed, leaning back and letting the water run over her. "You should have invited me in the first place instead of attempting to sneak out of bed."
The Doctor jumped, surprised by River's arrival. He smiled at her, reaching up to adjust the showerhead so it was easier for them both to use.
"Hey, darling." He murmured. "You look lovely this morning. I couldn't sleep, I thought you were asleep, so I just... thought I'd take the time, is all."