Families in general evaporate. It's all about your age cohort--no one else exists. (A generalization. I can think of stories where this isn't true.)

I'd be happy just for an acknowledgement that the MC's lives are more full and rich than what appears "on screen." A birthday card from Aunt Somebody, a calendar note to go to a nephew's school play (if the writer is committed to having the MC be an unattached young thing). Or even if they hated their family and fled it, a reminder of what they left behind! We don't just pop into the universe at 22! We have ties.