In February 2013, Mother sent L to school wearing a skirt and carrying a book, Princess Boy, for his teacher to read to the class. Mother did not inform Father until after L arrived at school. Mother claimed that L had long preferred female-oriented items and would wear girls’ clothing at home. Father claimed to have no previous knowledge of this preference. After L wore the skirt to school, Father made arrangements for L to begin therapy with L’s counselor. Father claimed that Mother was pushing L to identify as female even though L’s counselor did not diagnose L with gender dysphoria.
You can read the Court of Appeals decision here: https://www.azcourts.gov/Portals/0/OpinionFiles/Div1/2018/1%20CA-CV%2017-0048%20FC.pdf