so... my wife's coworker walked into our private. anyone else lived this?

right. so we book a small private in manchester, maybe 14 people, all vetted, all good. about an hour in this couple arrives late and i swear my wife went the colour of a sheet... turns out the woman is someone she sees every monday at the office. neither of them said a word for about 20 seconds and then they just burst out laughing and hugged. they're still mates btw, never mention it at work, never will. has anyone else had this happen to them? cause i still can't believe it actually went ok... thought we'd be ruined honestly