I'm sadly almost sure it's fake, but man....I hope it's real. Too good....and she got what she deserved.
If it's real......it wouldn't be a matter or beer in the closet vs. Ho-list in the closet so much as the sister being stupid enough to a) have that list much less having it where it could be found, and b) dime out the brothe rthat almost asuredly has the dirt on her.
My sister pulled something like that when I was a kid, though it wasn't beer but something else entirely that she tried to get me hung for. She came to me almost immediately begging me NOT TO dime her out for it. I milked that for almost a year before she got shitty and "forced my hand". Luckily we're both more mature now......at least we try to act like it....