She had nowhere else to go. Michael felt like banging his head against something, because now that she had said that, he couldn't turn her away. He was an angel, and she needed help. She was not a Hell-beast, even if she was a serpent creature who liked pushing people into lakes.
She was the proverbial puppy who had followed someone home.
It was clear he was giving in when he slumped his shoulders and nodded towards the door before he moved towards it. "I do not have to like this," he added, as an aside.