When Jessica shook her head, Jake looked confused. He quickly looked at the paint-splattered girl and said rhetorically, "What...?"
His eyebrows frowned at "planting traps at my front door", then his lips came together in a half-smirk and his head raised a bit in recognition. Then when she laid the key on the table, he looked at it, slightly in awe. That couldn't be for the basement... He thought, then looked back to her. She-- Nah...
After she spoke, he quickly defended, "No...! That water-bottle wasn't a trap... I was trying to get it back to you seeing as how you `left' it in the infirmary..."
Then, suddenly realizing what she had said, his brain playing catch-up, he stammered, "Your-- Your roommate..." He shot a quick glance at Paint-Splattered Girl, and said, "Oh...!" Then, he leaned into Jessica a bit and said in a low voice, "Is this your roommate...?" Then he smiled at Paint-Splattered Girl before continuing to respond to Jessica, "Ah, sure, your--" air quotes, "`room-mate' wanted me to come along." He smiled, pleased with himself, and nodded before answering with a shrug of one of his shoulders. "Sure, I'll come along. I already saved your ass once..." He stretched and put his hands behind is head, satisfied, and cockily said, "May as well do it again."