Remove her chestplate

She stiffens herself, grimaces, and clenches her sword, holding it in front of her with a twohanded grip, as if she's trying to prevent you from getting within arm's reach. No such luck luck however, as you simply zip past her weapon, running your finger along the blade with amusement, and walk to her back to undo the crossed leather straps holding her chestplate in position.

The straps run over her shoulders, cross eachother in the center of her back, and are fastened to the front plate at the bottom, above her thighs. You reach to unclasp one, and can feel tension in the strap loosening, as you allow it to hang slack across her back. Then you move to the other one, and when you loosen it the entire plate shudders, being allowed to be pushed outwards by her chest, no longer as constrained as when the straps were fastened.

You extricate the plate from between her forearms, which are still clasping the sword, and take a second to cop another feel through the gambeson. Sated, you walk back, put the chestplate in a position of honor among the stacks of plate, and allow the show to continue.

Never one to miss a change, the plate-less knight's moment of resolve is instantly dispelled, and she lets out a soft, quick gasp, barely daring to check herself to confirm it's indeed gone. Upon confirmation though, she reflexively moves her arms and blade closer to her body and moves her knees together. Even though she was still fully dressed she clearly is beginning to feel naked, especially because she knows you have already taken her bra.