In my experience, liars (i.e., narcs) will embellish their stories with inconsequential details to make the story more believable. @RVealingthenarc can comment on this observation.

This entire storyline cannot be true for a couple different reasons (in my opinion, allegedly):

1. MM was pledged to Kappa Kappa Gamma (KKG) sorority at Northwestern University. 
2. She was also the recruitment chairwoman for the sorority.
3. She lived in the KKG house on campus.
4. She double-majored in theater and international relations.

QUESTION: when in the heck did she "babysit", or "nanny" with whatever time she had left? 
It is not like she needed to "work". Her Dad was paying the bills.