She doesn't get along with her dad, but she doesn't pay rent either. Burn out from schooling and can't get a job, all she does is drink and play videogames all day. You've been hired by her dad to 'babysit' her, even though she is clearly an adult. So, torture her, be her friend, perhaps help her get over her introvert tendencies. At the very least, be kind to her. Please.