Go ask about the egg first.

After a thorough shower you get dressed and grab a biscuit to eat on your ride to the store.

You can spare one hour or two before the party to go to the store, the less time you spend with the bullies the better.

You got both eggs in your purse in a thermos with a few ice cubes, you don't want for them to get activated by accident.

After a few minutes you are a bit confused. You passed here twice already and can't find the store you bought the egg from.

You could have sworn that it was in this street between the laundromat and the old bookstore but there was a hole like if nothing was ever built there, the patch of earth is littered with old newspapers and empty cans, there is even grass and a few bushes growing from it.

The receipt matches your memory, 253 Gaunt Street. Except that the laundromat is 251 and the bookstore 255, there is no 253 Gaunt Street.

"Well I'll be damned, this is stranger and stranger. An old mysterious shop with strange items that disappear from the surface of the earth overnight. " you wonder as you try to get what to do.

You're not sure you want Brittany to enjoy such a thing but you would at least keep one. Besides you could always tell you didn't know if she tells you about its effects.