Oof.
And I quit a job that demanded I work Overtime when my kid was a few weeks old.
First i told them to f*** themselves, then dared them to fire me while I was about to leave for 5 months on parental leave (they'd have been on the hook for nearly 2 years of salary).
Then quit shortly after I came back.
Maybe it's just me, but my wife makes a great salary too, and if I were him I'd simply ask the team to suspend me for a few months while not reporting.
He's already a millionaire, and his wife is a doctor. Nothing on this planet is worth missing those first few months.