Ellen Tebbits (Ellen & Otis, #1)

Ellen Tebbits has a secret that she'll never share with anyone. That is, until she meets Austine—and discovers that Austine has the same secret! Soon the girls are best friends who do everything together—attending dance class, horseback riding, and dodging pesky Otis Spofford. But then Ellen does something terrible, and now Austine isn't speaking to her. Will Ellen be able to prove how sorry she truly is?