Inevitably I draw on my own relationships when I write, so if I'm writing about a fight between a husband and his wife, of course I'm going to think about a recent fight with my husband. Or if I'm writing about sisters, of course I'm going to think about my sister.
There are absolutely no problems that had anything to do with Jeff's departure.
There are just certain things that turn my head. It may be a girl's sense of humor, it may be her wit, or her belief system; it could be a lot of different things.