The Enterprise of England question

I am wondering if anyone has another opinion to this:

What was the reason Elizabeth was enraged and threw Robert Devereaux out of her room? Did she feel he should have come to her immediately with the news of Robin's death? Was it the smug way or words Robert used when answering her question if he knew of Robin's death? Or because Elizabeth was already in shock over the news, Robert's lack of humbleness over his step father's death as he entered her room to coerce her to join the festivities was the last straw? Perhaps all of these, but I've wondered because the two of them seemed to get along so well before this.