To reveal a hole in her chest full of greenish, stinky goo.

How high-waisted are her pants? Someone who wears pants that go up to their chest has worse problems than a festering open chest wound.

Maybe her sweater was tucked in?

That’s one hell of a tuck!

Okay, just to clarify, I did change some details to avoid the poor lady being recognized, but I left the size of the wound the same; big enough to go from her sagging tits all the way to her granny panties and a bit more. And yes, she did wear high-waisted pants and two sweathers; one over the pants, and one under.

Yes, and lifted her sweater. Proofread yourself, I still don't see why the situation makes any more or less sense either way. The person could've removed all of their clothes and it would still be as absurd :)

it says pulled down her pants and lifted her sweater