Maria herself explained the lyrics. She said this song was about hypocrisy and the judgement people would place on others(and the judgement that you placed on me, was a reflection of discovery). And in this song, she uses the word "WHORE" unexpectedly, as a empowerment. For example, people keep calling some women as whore ("I could be your whore"), though they might seem that they hate them, they actually created and needed them ("You love me for everything you hate me for").
So actually, the word WHORE becomes an empowerment, since it takes away the victim image and creates a heroine aura. From all the difficulties and disbelief placed on them, they emerged from the back of the car they should be lying dead.