As soon as Peter entered the room, Alessa placed her book down, and sat up on the bed. "It's okay. In fact it gave me just enough time to set that up for you." Alessa gestured at the painting set up, and spoke up again, "I hope that's enough paints and brushes."
She then stood up, and walked over to the door to touch it. Before Peter could ask, she answered, "I'm shielding this room, so that way if anyone tries barging in...well, unfortunately for them they'll be knocked back a few feet."
The power itself was simple for her. All she had to do was have the will for nobody else to enter the room at that moment. "Ready?"