What was your interpretation of the Old Couple?
How did you interpret them, if you interpreted them to be significant?
In my opinion, I feel like they were part of Diane's creation that was 'Betty'; I sort of imagined her to be this all american girl who was close with her grandparents, their pride and joy etc.
I thought them screaming at her at the end and driving her to suicide sort of represented how she was being haunted by her past and also by the fantasy she had created in her mind.