Yes it’s happened to me but only by someone who doesnt know anything about the faith or confession, so I just make a joke of it. I dont recall what I said but probably not what was actually said at least not exactly. I think it is natural to be curious about confession as this weird catholic thing that we do… so just start saying something about what kind of thing we are meant to be doing ie. the general idea. I might tell them what they initially wanted to know, ie what I told the priest but in general terms, like : I tell the priest my sins, so what I have been getting wrong in my life, why I think they are wrong and if I have been trying anything to fix that and if it’s been working at all, not at all or sometimes. Then he will likely give me advice and/or encouragement. Sometimes he has suggested spiritual readings/psalms etc. Then he absolves my sins and gives me my penance.