Annette had been playing an inactive part in this battle unlike her sisters. The reason for that was simple, her role was different from her sisters. Her task was to ensure the safety of their master rather than to fight the harpies.
She was unwilling to budge on this point ever since Simon told her that he would fight the queen on his own.
Since it looked like he would be unable to persuade her otherwise, Simon let her do whatever she wants. Besides, the others didn't need her help to deal with the likes of the Harpies.
Simon nodded his head and questioned "How many does that make?".
"Counting the one she had been directing at us just until a few seconds ago, it makes three" Annette counted.
The three that she mentioned, were the number of Evil Eyes the Queen of Harpies had used up until now. Since Simon couldn't gaze into her eyes, he was unable to tell, but Irene was different.