Legs wide

You tie her with her back against the pole at incredible speed. Her arms are securely wrapped in the straps of her bra, tied behind her back, thereby leaving her breasts entirely exposed, and jiggling furiously as she attempts to struggle with her bonds.

Using the various other straps and buckles, you place her legs wide apart, making it impossible for her to cross her legs, and allowing anyone a view of her crotch.

Her gargerbelt is tied around her head like a gag, and her furious, humiliated protests reach a volume no higher than muffled noise. You interpret her furious expressions, red-faced from her existential level of shame.

"Why, this is maybe a bit much", you mutter to yourself.

You walk over to the knight's discarded sword, retrieve it, and then stick it in the ground right between her legs, so that the pommel reaches to just in front of her crotch and narrowly covers her cunny.

"Much better", you say to yourself. We wouldn't want such indecency in public.