Wrap them around her knees

You securely tie the suspenders around her knees before walking back, and you will time to resume. Evellyn finds herself suddenly placed in a different pose than before, and she looks down to find herself no longer covering up but her wrists restrained instead and her knees firmly pushed together with her suspenders. She attempts to sink a bit further behind the boxes, though her tied knees make it a little ungainly. Evellyn struggles for a few seconds, her breasts bobbing about as she's straining against the bondage of her own bra, before she stops and snaps her head towards you with an incredulous look.

"Really?!"

"You wanted your bra back" You retort

"You know damn well what I meant and what I meant was not bondage!! Untie me right this instant!" She shouts as she alternates between holding her hands in front of her crotch or her tits, and trying to reach down to untie her knees before reconsidering and quickly retreating to cover her naughty bits. All the while she has to crabwalk a few steps to properly retain her balance.