You are not auditioning to be her daughter. You are auditioning to be a stable, kind, respectful partner to her son.
The playful, messy, open-book son may be replaced by a more private, polished young adult. That transition is healthy — but still painful. My Sons GF version
: Humorous "intro" videos where the mother playfully analyzes the girlfriend's habits (like studying fashion or enjoying brunch) while being slightly nervous about the meeting. Amazon.com 3. The "Drama/POV" Version You are not auditioning to be her daughter