There was a very wide grin from where Jack lay beneath Ril's petite form, stretching his neck a little to see around her to their unexpected guests. Not unwelcome, mind you, because the sight of the Doctor's flushed cheeks, evidence of fresh snogging on his lips, his eyes wide: River, gorgeous and sly, mischievous, as she kept the Doctor bodily in place, a smirk quirking at her lips... They were definitely not unwelcome. Jack glanced up at Ril, his eyes sparkling as she ducked down for another kiss after her question, and he returned it full steam. After all, it wasn't as if there was anything in this room that anyone in the room hadn't seen- at one point or another- and unexpected or not visitors, he wasn't going to stop a beautiful woman from kissing him. Only when Ril's lips parted from his own again, as she drew back just slightly, did he speak.

"Certainly is. Bet it could fit all four of us, plus some. We should try that out." And here his gaze traveled, to River first, catching her eyes with a wink, and then shifting to pin blue eyes to the Doctor's gaze. "Right now, as a matter of fact."