Not even when she was staring Paul in the face did she immediately believe that he was Paul. No. It wasn't possible and it was an outrageous coincidence. She HAD to stare at him and she wasn't shy about it. ( No wonder he might be concerned that he was pantlessly carefree!)
He looked more grown up, there were a few extra wrinkles around those twinkling eyes of his...and that took a moment to get used to. Years had gone by since they'd last been face to face like this and it hit her hard. Maybe she didn't want to believe he was here because she'd been doing such a delightfully prudent job of being cold and distant and Paul wasn't the sort of person you could be cold and distant to.
She'd give it a try though...
There was no questioning relinquishment of his name. As soon as he stepped back to allow her in without so much as a thought, she believed that this indeed was her friend. It didn't make her disbelief that he was here any less substantial though.
"I had to come down and see for myself." She'd explained as she studied him. Glancing at all his parts, maybe making sure that he wasn't some high tech carefully crafted Japenese robot or an actor doing a spot on impersonation. "What are you doing here?"