Green’s Dictionary of Slang

the male version of the more common -widow sfx

1969		Listener 17 Apr. 534/3: He’s a football widower because I’m the one who’s always trooping away to football matches.
1973		Guardian 25 May 11/2: The age of golf widowers is developing.
1999		Amer. City Business Journals 6 Dec. 🌐 ‘It used to be that that gals would want to play when they retire with their husbands, because they were becoming golf widows,’ Stubblefield says, ‘but now, they say, “My business wants me to play.”’ Jansen says her husband is actually the ‘golf widower.’.