Tim could be notorious for bad timing in social settings. It was a thing he had to work on even still apparently because he'd interrupted the introductions. An apologetic smile shot at the Winchester though he returned the greeting. "Hey Dean, Buffy." he too had to try not to be awkward around Buffy. Not only because he liked Dawn, but ever since the fight in general he felt tense around her, even a little pride hurt. But this wasn't about that, it was just relaxing and hanging out so when Dawn spoke up he grinned. "Hey Dawn."there was a fondness to the tone at her. "Not every day we get to see a magic indoor pool. Wasn't gonna miss this. Or a chance to school you. If you wanna back out now I totally understand." Tim teased her before looking over at Dean with a smirk.
"Dawn said she thinks she can beat me in a splash fight. I can't resist a challenge." It was a little known Tim fact. No matter what the challenge was he'd accept. Even if it were in the water.