I remember parts of the conversation where Stark asked how much he drank (I think it was vodka?) and Peter replied ‘three cups’ (or something similar). And Tony almost got a "heart attack" when he heard that but tries to rein in his anger so as to keep Peter lucid. When Tony finally showed up at the party, he was relieved to find Peter far away from the pool and proceeded to take him away.
I am also pretty sure that the author wrote a follow up piece in Tony’s perspective. And it's on AO3.