Do second weddings count?

As you might  know, I'm a big fan of the BBC radio show In Our Time, which I get as a podcast and listen to while running. The most recent show, on the invention of radio, contained a discussion about how little credit Marconi ever gave to anyone else, among other personality flaws, and included this exchange:

Simon Schaffer: This is a man whose best man at his wedding was Mussolini.

Elizabeth Bruton (quickly, seeking to set the record straight): Second wedding.