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RFV-sense for the "widow" sense. I tried to find claims that "she was an ace of spades" or (his death left) "her an ace of spades" or similar, but the only thing I found was this note about a ship:
- 1978, Anna Sproule, Port out, starboard home: the rise and fall of the ocean passage:
- The horrible rumour grew up that her double bottom contained the bodies of two riveters who had accidentally been walled up alive. She was an ace of spades among ships. The problem of the Australia run was finally solved by the introduction of the compound engine.
— Beobach 00:17, 22 November 2010 (UTC)