That won another soft, rusty not-quite-laugh and a glance aside. All of his life revolved around Tony. What was one more thing, right? Not really, but he'd let it go in favor of not poking at sore spots better left alone. Tony was pleased. Jarvis was pleased. They could both leave it there and call it an unprecedented (if unwise) success. It was a good decision, and Jarvis made it silently while the other man worked, because there was nothing at all he could offer at this point about changes that should be made. Maybe with time to use his voice, he'd discover something he wanted changed or tweaked, enhanced or reduced, but that would come with time.
Unlike some people, Jarvis had more than enough patience to appreciate the discovery. The trick would be finding time to use it. This was something to only be utilized when he was alone, or when Tony was the only other person nearby- no phones active, no screens, no visitors, no media. It would be something of a challenge, but Jarvis was sure he'd find the motivation to make it work.
He caught the keyboard when it slid back his way, immediately snaking it close so he could reactivate and use it again. "I've seen you make drinks," he replied, appreciating the dry, if somewhat artificial tone that resulted. "My liver hasn't had as much practice as yours when it comes to handling a celebration." Jarvis wasn't going to retrieve that bunch of papers. It was fine. They weren't important (probably) and he'd no need to go scurrying back to work, especially if he was being asked to linger.
"Perhaps if you promise to go easy on me." If he mixed, he'd have to put the keyboard down and Jarvis found himself surprisingly unwilling to do that right now.