So the holidays are coming. And you dread a day spent with your mother, mother-in-law or sister. What to do? Dr. Cheryl Dellsega has some tips. A professor of Humanities and Women's Studies at Penn State Hershey, Dellasega is an expert on relational aggression and the author of a new book: Forced to Be Family: A Guide for Living with Sinister Sisters, Drama Mamas and Infuriating In-Laws (Wiley, 2007).