Oh no, Hermione is definitely walking in on Snape and Draco. My brain just produced this image: Snape on his back with Draco impaled on his cock, riding him, and Hermione in the doorway without any underwear.
I think it may have come from the Snape/Hermione I was reading (here--most of it's not very good, but I am kinky enough to like this chapter), but that still doesn't explain Draco
Re:
no subject
I think it may have come from the Snape/Hermione I was reading (here--most of it's not very good, but I am kinky enough to like this chapter), but that still doesn't explain Draco