One Mom Too Many — Ann Bryant

In "One Mom Too Many!", the first book in the "Step-Chain" series, we are introduced to 12-year old Sarah. She is being forced to spend every other weekend at her father's girlfriend's house, but that doesn't mean she has to like it! Sarah decides to be as rude and uncooperative as possible around her other mom. But over time she realizes that her behavior is hurting herself more than anyone else. Will Sarah learn to accept this new family?