The reasons (1)

Shortly after, Matt returned to the room, but before he could enter, the door opened. Alice had prepared herself differently and looked slightly desperate, somewhat haggard, and even frightened. This side of her was more evident because she was wearing her natural face.

Matt was surprised to see her, and she was stunned when she saw him standing there. But, at those moments, several hallway doors opened, causing Matt to quickly push her into the room and slam the door shut behind him with a bang.

Matt glared at Alice. "Why are you coming out with your real face? That's dangerous, Alice!" Although he shouted at her, he looked deeply concerned. He didn't know what he would do if they found out Alice was a vampire, for that would put them in mortal danger.

But Alice ignored all this. She was so stunned to see Matt arrive that she didn't even notice she was wearing her natural face and didn't even hear what he had said to her.