Yeha, I'll be chaperoning. Maybe posing as one of the cool dads. [ As if he isn't actually a cool dad. He certainly doesn't look old enough to be one but most people have gotten over that by this point. ]

No, Peter, I'm not going to help you with setting up a party I've already agreed to be involved in. [ He tilts his head to give him a look. ] Of course I'll help with that.