Sooo heres the thing : she took an experimental formula thats bound to wear off ..and its not like she can steal more so once her power fades what is she gonna do?my guess is go back to normal and get arrested.
IKR! It's like, "Okay. You're powerful, but you had to kill someone in a horrific way to attain said power. And then the implication is that it's not going to last. So you essentially murdered 3 people for no reason, other than you could. Not one to blow off the dust on the ol' Moral Compass, huh?