imthechump, I do know where you are from, but get you head out of your rectoidal area!
Violence, just what the helll we need more of! NOT!
Get out of the Kid range and work on becoming an Adult at least partly!
If YOU can Prove theft, then dump her ass ASAP!
She sounds like a sponge of alien magnatude!
You dump her and no extra income, then you all pick up the xtra on the rent! Simple!
Your decision!