Point of view: Your giant girlfriend requests your assistance while changing her outfit. The size difference renders you pretty much useless, she knows it, you know it, but she enjoys to have you around, and you enjoy the view.
Just imaging standing next to her giant paws, her toes alone taller than you. She lifts her foot to step out of the pantie you're wrapped in and slides another one over her paw, just to put it back in the ground. She is gentle but still her stepping on the ground makes the ground shake and knocks you almost over. And be carefull, maybe she scoops you up with the fresh panties.

This was just some random drawing