That asshole.
How dare he leave, with only a note saying that this was for her own good. How dare he leave without even consulting time she checked, she was the one who had been calling the shots, not him. She doesn't need him to decide what is best for her.
She was the one who he had grown up with. She was the one who had lived in the cage by him for 10 years. She was the one that he had followed almost unconditionally.
She was Maximum Ride, gooddammit. She was supposed to be the person who SAVES THE WORLD. She was the girl who was famous for her stubbornness, her fighting skills, her leadership. She was the girl that saved their asses infinite times by creating crazy schemes faster than the time it took for most people to blink. She was the girl that he had pursued, cuz they both knew that she sure as hell hadn't gone chasing after him.
Who was he dictate that his leaving was for HER own good. Who was he to say that his leaving was for the benefit of the flock! She was the leader of the flock, NOT HIM!
That decided it.
She would forget about him. Well, not completely. She would take her of her flock, her first and only priority. And if she ever saw Fang again, she would show him how fine they were doing without him. She would show him that she no longer needed him. She would show him that she was no longer dependent on anyone but herself to take care of the flock.
She launched herself out of the tree and flew back home to her flock of four, her TRUE family