Put up an add on craigslist advertising her as a hooker. I normally wouldn't advocate such a strong response, but if this is real she more then deserves it.

I'd kick that little brat in the pooper so hard! 

You should have asked the security officer for one thing to shout to your sister, then yelled, "Hey, [name of your sister], thanks for doing this to me, now you're gonna have to look for me in this entire mall. Good luck, douchebag!" and then just hid in some obscure place near the clothing store, watching her frantically look around in terror.

This is dangerous ground for me... (looks around) Is Sirin watching?

so do i, OP. your sister's not alone.

Knock yourself out!

hilarious :)

Waiit I think I saw this on a TV show.... can't remeber the name.

(dips toe in the water) (chickens out)

the funniest thing about this FML is that if you have done the same thing to her you still would have gotten laughed at.