Making waves... For once, identical twins Elizabeth and Jessica Wakefield agree on something! Their friend, Mary Giaccio, spends too much time at their house. Mary is a foster child in the Altman family, but she's acting like part of the Wakefield family. If there's one thing Jessica and Elizabeth don't need, it's a third twin! They're desperate to find some way to discourage Mary. Then Jessica overhears a private talk between her parents about Mary's future. Now she knows something that could solve the twins' problem and make Mary happy too. But Elizabeth warns Jessica against spreading her news. Does Jessica have any right to interfere with Mary's life?