Based on those sentences, I had concluded Dr. Mao was not her advisor: "I had to email my dissertation mostly un-read by my advisor to my entire committee (a scandal in and of itself), because, as my advisor wrote in a terse email to me, they did not have time to read it. Despite the gross negligence that this brazen declaration signaled, I was relieved by this, because it meant that I would go straight into my defense with a very high chance that Dr. Mao had not discovered what I feared they would."

I took that to mean that since her advisor told her that her committee was unlikely to read her dissertation before the defense, she took comfort in believing Dr. Mao - a member of the committee but a separate person from her advisor - would also not read it.