Truth be told, there was no way Alice would have her guard up with Matt.
When she saw that she was entering Matt's room, she immediately prepared for many things to happen. She thought her time had come, and today was finally the day.
Matt looked so determined; how could it be anything else?
That was why her guard was down, and she planned to let Matt do whatever he wanted, regardless of the rest.
Still, it didn't end up being what she wanted. Despite that, her thinking was simple: Why would I have my guard up with the man I want?
Still, Matt had no way of knowing.
Soon after, Alice finished receiving all the information Matt wanted to give her, and she was stunned. Her mind whirred with a few words: Who is Matt? But she didn't ask the question.
When she opened her eyes once more, she noticed Matt's bare neck, and that immediately activated her vampiric instincts.