She has to work in the morning, and her car is still broken down. She's going to go spend the night at a co-worker's house and ride in to work with her in the morning (same friend she lived with during our separation - I know it's her because I overheard the phone call). So, she's finally taking responsibility for herself . . .
Or, this is an "enabling BFF," covering for her. Wouldn't be the first time -- it's very common.
