Adalind making the assumption that Kenneth would use Juliette to attack her was more than reasonable. The writers were pretty much screaming it at us. That's why Adalind says "You wouldn't!" right after he tells her he's going to inform Juliette about Adalind being pregnant. Juliette had already nearly dropped a gargoyle on her at that point and she reasonably assumed that she would come after her without hesitation after hearing the news. Adalind specifically requests that Nick protect her from Juliette.
Adalind tried to tell Kenneth of her importance by mentioning she's Diana's mother. Kenneth was strongly implying that they were going with Juliette and didn't care what she would do to Adalind.
Adalind tried to tell Kenneth of her importance by mentioning she's Diana's mother. Kenneth was strongly implying that they were going with Juliette and didn't care what she would do to Adalind.