yes! the former is to do with how elle was brought up (she had a religious mom and a step dad who was less than awesome), so she either would have stayed at her friend's house/thought of her as a second sister, womb to tomb, etc, etc. the fwb is as messy or easy as you'd want it to be, since elle is just starting to work out as an adult what she likes/doesn't like, so it could be complicated with her going hot/cold all the time, or they both just understand it's a "u up?" sort of thing.