Most of you have probably done this. I replied to my partner Simon about an email from a very valued client; and as Simon and I sometimes do, it was in the vernacular - a little deprecating to be honest, but totally unintentionally so on my part. I immediately apologised to our client who took it all in good spirit and saw the funny side of it - but my God - how embarrassingly cringeworthy. Yes - I sent it to the client by mistake, not Simon. Anyone else have similar stories?