The Family to Which I Belong

OK, first off, the P.O.V may change from time to time, but the main person, a 16 year-old girl named Tegan feels like an outcast at home and she feels like she's not treated as an equal. One day, she takes a job of baby-sitting a girl and taking care of her horses while the girls parents are on vacation. She finds out that the girls mom is a dominatrix and that the 'father' is a trans woman. And as time goes on, she finds that she loves them both, as they love her. And, when she's 18, she joins the family. But, we also learn of this girls home life, and the child-hoods of the Dominatrix and trans woman, as well as her involvement with a dangerous gang that is a constant threat.