The wife's Mother said, ‘When you're dead, I'll dance in your grave.’ I said: ‘Good, I'm being buried at sea’.
Les Dawson (2012). “Les Dawson's Joke Book”, p.14, Michael O'Mara Books

The wife's Mother said, ‘When you're dead, I'll dance in your grave.’ I said: ‘Good, I'm being buried at sea’.