Maybe later, Xanthippe would gloat about how despite their best-laid plans (pun not intended), he'd once more ended up too far gone for any of the finesse those required.

But right now? Maybe it was the words and his hand and the angle of the sharper thrusts. "You're gonna possess me in so many new waohhhhhh my --" Her voice was a sultry sort of panting, until it dissolved into a considerably louder moan, and then died off abruptly into something more like choking on air. She'd never come on his bare cock before, so... that was an experience. And a little abrupt.

But if he could withstand it once, he might get to coax another one out of her. So there was his probable incentive to try, at least.