Well! That would serve her right, having to be the one to chase after him for once! Hims. If you must be technical about it.

"You'll have to be three times as careful," he says, not thinking he needs to specify just what it is she'll have to watch herself about. She knows. At least she's careful about that, even River can't resist those teases here and there. He catches an odd little expression on her face just then, the Doctor tilting his head curiously. "Uneventful. Big robot attack on Stacy and you call it uneventful!"

He sounded half incredulous, half impressed. River Song, a woman who knows her adventures enough to be picky.