Given their recently regained mortality, and not knowing about Jack's circumstances in this world, Mary casually followed after Jack as he ran up the stairs. She wasn't suspicious of him or this place, but she wasn't inclined to let him run off on his own either.

She turned the penlike device over in her hand as she went, trying to get some idea of what its purpose was. She called out to him before entering the office, giving him some warning, "Jack. I found this. Can you tell me what it does?"