Big Girls Don't Cry... They Get Even(1991)

Lara's parents separated when she was eight years old. Now he is thirteen years old and lives with his mother, stepfather, two nephews, a half-sister and a half-brother. He used to visit his father, stepmother and half-sister, but now another divorce is about to happen. Lara's father has a girlfriend who is only six years older than Lara and is currently pregnant. With such a family situation, Lara doesn't know who she should be loyal to and plans to run away from home...