SU, how long would you stay home for kids?
and what if the couple happen to not have kids?
Trust me dude, if the couple didn't have kids, they'd have other issues to resolve than her working situation. And, if they (God forbid) don't have kids, the guy will easily change his mind and let her continue working.
P.S. Work isn't the only way to occupy one's mind and certainly not the only way to employ your academic and practical skills.