Peter had been sitting at his desk in the office, going over two medical textbooks. He hadn't forgotten information - he hadn't ever since he inherited that perfect recall - but it never hurt to check the new information. His research had been interrupted - briefly - by Simon's appearance in the doorway. Peter blinked at the plastic lightsaber he was weilding, but when Sarah's voice called out a moment later, Peter slid his seat a few inches to the left. Simon caught the cue, and wriggled under the desk to hide.
He also earned two of Peter's Oreo cookies while he was there.
There was shrieking and laughter outside the doors. A few moments later, Monty appeared in the doorway. Peter glanced over, just as Monty was raising his hands in the universal 'time out' gesture. And then Peter started to laugh when his nephew held out another plastic lightsaber for him. "Okay," he said. "I'm game."
Monty grinned. "Time in!" He drew his face into an evil, serious expression, raising his lightsaber. "Jedi Master Uncle Peter!" he said. "My master--" Then he paused, his face relaxing into a look of confusion that was far more regular for Monty. "Do you still say 'master' if she's a girl?"
Peter grinned, and nodded. "They do in Star Wars."
"Okay." Monty quickly got back into character. "My master says that your face lies, and go into a fate.. a fight with her!"
Peter raised his eyebrows, holding back his laughter. "Is that so?" he said, feigning shock. "So, young padawan. You have turned to the Dark Side, then?"
"Yes!" Monty shouted, proudly. "And I'm gonna fight Simon now!"
Peter lifted the lightsaber. "A duel of the fates, then." He slid the chair to the side. "Come along, my young padawan," he said, beckoning Simon out. "Let us show them that the Dark Side will never triumph!"