Ogle her some more.

The barwench has sunk to her knees in front of you, her hands tied behind her back, unable to tolerate the shame of being completely, beautifully naked in front of a total stranger. She's blushing bright red and looking around the room for an exit, wanting to run away but having no idea where she might go. If you don't give her any clothes she's going to have to run all the way home bound and naked, and that sounds even more embarrassing than staying here and letting you look at her.

"I hate you," she mutters. "You goat-sucking piece of..." What follows is a torrent of obscenity that you would never have expected to hear from such a pretty girl. "Have you had your fun yet, pervert? Untie me and give me some clothes before I call the guards."

"If the guards came they'd see you naked. They'd probably appreciate the sight as much as I do."

"Shut up!"

The wench obviously hasn't learnt her lesson. You could let her go, or you could teach her a little bit more humility.