Syrinx was surprised at that offer, mouth opening in a neat O shape. That was a lot more thoughtful than Apollo who basically left her to her own devices in the kitchen, already Syrinx had developed a pathological dislike to cheese and peanut butter.
Of course that was Apollo's plan, unbeknown to the nymph and the twins, but it would all come to light throughout the evening. Her hand reached out to grasp the very edge of his shirt, barely touching- it was to make sure she did not get too far away in the increasing crowd. Syrinx didn't want to be too close either.
This was all kinds of awkward, she wished to be somewhere else, but at the same time didn't seem inclined to try to leave. Instead Syrinx waited for Castor to take the lead. Somewhere at the bar, Apollo was laughing and slapping Pollux on the back- he was busy ordering some of the most expensive stuff on the list. (If it was expensive it had to be good.)