Me and my big mouth :(

[apples and bananas]

I would agree with Playfelt. I wouldn't bring it up either. If you bring it up it almost shows that you feel guilty. I think the parents need to trust our judgement with the kids. And if they are the kind of parent that takes something like that out of text and looks for other care because of it then I don't think you want that type of parent around.

If I was the parent I would probably chalk it up to a one time occurance and watch for more red flags before I make a judgement.

[Spixie33]

I agree with Playfelt and Apples&bananas. If you say something then it looks like you are worried or that you were indeed saying something bad/wrong.
I would stay quiet and see if the parent mentions anything or references it in the next day or so.
If they do ask what happened this morning then say that you were just having one of those rough mornings. You are only human after all. Hopefully the parent didn't hear much. I would just be very careful the next while to make sure that this parent sees your best side