Inside the mind of a teenage girl

Mckenzie and her sister and mother are all very close. They have a distant father who is only interacted in Laura. Mckenzie Is heart broken when he says he wants her to die and doesn't see the point in fighting her illness untill she and Laura go to a night club and meet the blood sucking brothers. Mckenzie wants to get better but her illness is terminal now and is killing her. Laura and her mother know that the two bothers are vampires and when Mckenzie reaches the end her lover is forced to change her for fear of loosing her.The question is does he have the final will to stop.