She's gotten away from being barefoot all the time, so they're clean enough--for feet. She has a hunch a real hardass dom might order him to give that foot a real kiss, but she isn't into humiliation. This was just a little nudge to see what he might do.

"Good boy," she teases, leaning down to kiss his forehead. "Rub my calves, they're tired from dancing last night. And tell me the craziest thing you ever asked someone to do to you."