Mark, that is a bit bizarre (sorry! )- you can maybe see why it looked like you were persuing. Drop it now, it doesn't need to be mentioned again. It isn't a back step or a big thing, it takes a little while to settle into the new pattern.
In future just text your wife and say something like 'I've forgotten what you said about the arrangements for the children tonight'. If she gets huffy, do not rise to it. Just text back saying 'thanks for letting me know'. As DrH said, smile and wave