Excuse for a Les Dawson joke

Les DawsonI can't imagine that there'll be a rush to take advantage of this, but it will now be possible for in-laws to marry, thanks to the Marriage Act 1949 (Remedial) Order, which was recently approved by the House of Lords. I'm sure this is serious for those involved, but I can't help remembering my favourite Les Dawson mother-in-law joke: "I can always tell when the mother-in-law's coming to stay; the mice throw themselves on the traps".