Don't expect to keep secrets around Guy, I guess!
My guess is he has a listening device attached to Piper.
Will Ash catch Caterpie? What the heck is Burk up to? Will Pablo ever realize that Guy bugged him back when they were cuffed together? Find out on the next episode of Dragon Ball Z!
I think this is actually because of the blackmail we saw earlier.
Guy himself is pretty good at keeping his own secrets mind.
Being coy isn't gonna help the group's opsec, Guy.
I guess Guy is truely a great master of his vocation or he is really good in guessing :D