Dena and Samantha were friends up until 7th grade. Samantha's mom says to Samantha, "You haven't spoken to me in 2 years." Dena adds, "20 for me." In the next scene, in the car, Dena is talking about her mother's funeral and says to Samantha, "You insisted that we move the day of the funeral so you could be there. You still didn't come." If they weren't friends, why would Samantha have been involved in the funeral?