Reading this chapter again I'm 100% on Audra's side. It doesn't matter if Alex Forbes loves her. He has no right to question her decisions as captain, and if he did it in public, he even more of an idiot. I shall assume he was at least clever enough to keep his stupidity private. Even if Jenson is right and Audra took on the rescue mission herself partly from worry about Alex, he's also insulting his sister by hinting she would let her emotions overrule her intelligence and common sense. I bet she was the most competent person on board to carry out the rescue mission, plus the foolish leader of the research mission might have refused to evac if someone with less authority had arrived. If Audra had thought someone else were better, or if she had thought she was more useful as backup if something went wrong, she wouldn't have gone. Alex lecturing her on her duty as captain, something he has no specific knowledge about, is not only chauvinistic and condescending, but utterly disrespectful and designed to make her resent him and justifiably so. We would be shocked if he had said it to a male captain and being in rescuer does not excuse his behavior at all.
Audra is one of my favorite characters in this tale, and I can't wait to see her handle the misogynistic Aleuthians, with the full backing of Merrick, who as the human envoy (and unrelated to her) is bound to tell those idiots where to stick their stupid prejudices.