Tie her up

She simply cannot contain the emotional cocktail of surprise and humiliation, stammering while trying to cover herself "Wh- how did you..?!"

She doesn't even get to finish putting that sentence together before you're back at it again, moving at an inconceivable speed. You think a second, before deciding on a small addition. You grab her bra from the pile of her clothes, walk behind her, and use it to tie her arms behind her back, wrapping the piece of fabric around her arms a few times and binding it tight using its own clasp. Then you grab her belt, push her feet towards each other, and tie her ankles together so she can't do anything but hop around.

You sit down, and slip back into the normal pace of time. She gasps as soon as she notices her bondage. She struggles with her arms but can't move them, being merely able to wriggle her torso around, which causes her breasts to continue jiggling, just adding to her mortifying embarrasment, while she can't cover her crotch with her thighs because of her bound ankles. She can't do anything but struggle and hop, to try and maintain her balance, but giving you a complete full frontal view, including of her continuously jiggling tits.