Ian O'Doherty: It could happen to the best of us
The tradition of anti-mother-in-law jokes historically comes from post-war Britain, where the lack of housing following the Blitz resulted in returning soldiers being forced to move in with the wife's ma.
And after five years of fighting fascism, many of the men felt they had done enough and didn't like being bossed around by someone who wasn't even their superior officer. And, still, to this day, mothers-in-law tend to get a hard time.
ISpy is lucky in the sense that Mrs ISpy's mother is a fine woman, although between yourself and meself, we could do without all those suggestive and impossibly lewd remarks she makes every time the wife leaves the room. It really is quite disconcerting.