She can’t talk back if she’s gagged

"You goddess-damned bastard!"

“Okay that's enough”. You go grab her garterbelt from the stack of her clothing, and use it as a makeshift gag again.

The knight tries to protest, but her backtalk is finally reduced to just muffled complaining. She struggles, but there’s no way for her to escape her bonds.

Shaking, trying to cross her legs high enough to cover her crotch, she turns red all over her face. Surely she got the message now?