~Next day~
Carter is on the elevator when the door opens and O'Neill gets on. The doors slide shut. As the car starts to rise, a soft sound comes from her throat.
"Still humming, I see," he says, smirking, giving her a sidewise looks.
"Yep."
"Different tune, tho."
She tries unsuccessfully to suppress a smile, and glances up at the security camera. Throwing a come-hither look his way, she backs into the corner, out of range of the lens.
With no hesitation, he hits the stop button and joins her.
"Thirty seconds," she whispers, just before their lips crash together.