Simon rolls his eyes, resisting the urge to stick his tongue out at her. She makes it easier for him to finally give in by doing it first, looking like some Chinese demon painting on rice paper with her heel resting on the barre, body bent down and head upside-down. He's not quite sure if it would be more or less formidable with her hair hanging down from the top of her head instead of scraped back tight into a bun.

"Besides," she says, shifting her foot a little on the ground to twist her body and face away from him, mirroring the stretch in the other direction, "Being a Companion is more about knowing how people think than actual sex." She turns to face him again, and Simon has a familiar feeling of dread as he sees the somewhat devious smile gracing her face ever so slightly. "Who says I'm not good at that too?"

Simon grimaces, no doubt playing right into her game. "Please," he says. "Just--" he shudders. "Please."

Never one to hide enjoyment of her success, River allows herself a fully-fledged smirk. Simon's instinct to fight back is automatic. "Besides, I'm the one with the extensive knowledge of human anatomy."

River raises an eyebrow and that's all there is to it; Simon drops his gaze back to the datapad, repressing a sigh.