Elder Sim with teen granddaughter.
This family has been "played" for 2 Sim hours, mostly supervising to ensure they didn't form any attachments to Sims outside the family. They had to wait for the paper to get there and the mom to move out. All other actions and reactions were initiated by the Sims themselves.
I believe the mom is in the packed lot too. You could probably retrieve her with either SimPE or the Tombstone of Life and Death and add her to another family. Her name is Mattea Hope if you care to try.
You might want to "time warp" them back an hour or three so the teen can make it to school on time!