Boys on the Side
The women in "Boys on the Side" challenge normative female relationships because of the boldness with which they regard one another and the world around them. Female friendships in other films (i.e. Set it Off, Thelma and Louise) did the same - it seemed that when in the presence of their friends, even the quietest or shyest of women were louder, more outspoken, more confident and more likely to stand up for their own wants and needs than they were when they were alone. The three women in Boys on the Side protected one another (removing Holly from a violent situation by using violence to pacify her drug-dealing boyfriend Nick), nurtured one another (Jane waited at Robin's bedside when she was in her sickest moment in the hospital) and encouraged one another (by cheering up Jane to help her get over her last failed relationship). These three were "outlaws" running from the police in Pittsburg, so as not to get caught for NIck's accidental murder, and so challenged the existing normative female relationships by being in-your-face and bold.
Their family structure at the end of the movie, however, was closer to what society may consider "normal": when living together, they cared for Holly's new baby, helped ease Robin's pains until her death, and were reliable and were there for one another through thick and thin.