What a troubled young woman and self-inflicted pain is just a slow death wish imo. She'll eventually kill herself even if it is just through abusing her body. And the pitiful thing in this situation is she knows it and commands so much attention, but still doesn't have anyone who really gives a shit enough to step in or she's so far gone that she is invested in total self-destruction.
Her parents should be ashamed of themselves. In this case, I'll lay this directly at their feet, especially given the state of their other teenage daughter. I hope living a cushy lifestyle for a while was worth selling their flesh and blood to the highest bidder. I see them as little more then pimps.