IMO there would have been nothing wrong with blowing the whistle & stopping the game for a word with Coach B at that point. The play seemed unusual, the coach wanted an explanation, wouldn't have hurt to give it to him especially since it looks like you knew your partner might have had it wrong anyway. As for getting the ball in quickly to avoid trouble...nah. If something unusual happens there's nothing wrong with making sure the crew got it right, even if it takes a few seconds to huddle and another few seconds to explain what just happened including why you are or are not changing the original call.
Of course, don't take too long dong this & don't do it too often!
