Three

Hermione looked up, shocked to see what appeared to be two more versions of her right in front of her. All the symptoms seemed to indicate she was under the effects of that duplication spell, but to see it with her own eyes was its own shocking matter. Granted, the book only talked about the possibility of getting one duplicate, not two, but it was still shocking. Good thing it ripped apart clothes as well, because it allowed Hermione to confirm that not a single spot was different between the three of them. It wasn't an excuse for her to examine her own hot and sexy body, not at all.

"So if you're the exact same as me..." The three Hermiones spoke at the same time, seemingly confirming that the four were exactly the same. "Then who used the spell on us?"

"Who's there!?" The Hermiones froze. They were in the library and out in the dorms much later than they should, so if they were spotted here with a forbidden spell cast on them no less they could potentially be expelled. Luckily before coming here Hermione asked Harry for his Invisibility Cloak, and quickly covered the three of them with it.

Immediately there was a problem. It was a cloak made to cover one, and maybe it could handle two, but three Hermiones had to squash themselves together to fit under the cloak. Their breasts and nipples had to press into each other and squeeze to make some space, and their pussies had to line up to avoid anything sticking out of the cloak. Their hot blushing faces were next to each other, and this was all too erotic, but one inopportune moan could alert the staff of their location.

The three Hermiones squeezed together, **** to prevent expulsion.