e-wife
A woman who's married to a man online and they argue about everything like they're actually living together. They fight about who's the best parent to their fake kid, who left the door open, and who's the best lover. The guy version is called an e-husband and he's just as bad.
'You're the worst lover. I'm moving to Antarctica.', e-wife to e-husband.
'I'm not the worst lover. You're just bad at love.', e-husband texting back.
'If you don't stop fighting with me, I'm ending this marriage.', e-wife in the middle of a text argument.