He barely even feels it. There's something to be said for being an athlete, after all. So he just grins at the smack before winking at the bartender. Liam knows better than to say anything out loud, but it would be something like, 'Better to look at than to touch'.

Besides, he respects her more than that.

"You're one twist away from snapping," he says to her as he pushes the shot toward her. "You do tonight."