i dont remember the what goal this is exactly, but hrmm.. her goals.
after finding out her secret and talking to her, she bites your neck. what you would have to do for her is make a potion to cure her (AND YOU) of this vampirism.
to do this, you need to go to the station. talk to mambo lady, and she'll give u the reciepe to make this potion. go back to deadtree, buy what you need.. i think plamsa and garlic.. not sure and go to the workbench n make potion. BE SURE TO MAKE TWO. one for you and her. then go back to her and talk, to give her the potion.