Board Thread:Boruto Discussions/@comment-5085906-20170430152255/@comment-25122992-20170503214614

Well, actually, Sarada herself didn't activate Sharingan consciously like two times, it happened just because of emotions (the moment of awakening and then the moment when he mistakenly learns that Karin is her "mother" and gets into an argument with Naruto), she did it on her own will seemingly only during the battle with Shin army.