When she curls her leg around his waist and when her nails dig in, he's encouraged to move even closer still, bumping her against the wall none too gracefully as he thrusts into her as deeply as he can, biting off a nearly-shouted curse. Sure, people might assume that, given the noise of the party, someone swearing loudly wouldn't be noticeable, but he's not stupid enough to take the chance of having this interrupted. People can watch if they want, but he doesn't want anyone trying to break it up.

With the pace he's setting and how hard he's breathing, it's probably pretty obvious that he doesn't think he's going to last that long, anyway. This wasn't meant to be drawn out and sweet, it was meant to be quick and dirty, and that's what he's giving her with every movement of his body.