You always have to admire the ability to suspend disbelief when Wife #3 figures it's forever.
Or maybe she figures she can run out his clock.
"Or maybe she figures she can run out his clock." She's probably thinking right. (Right as in correct, not right as in moral.) These guys usually run out of steam and don't want to part with any more money once they marry Wife Number Three and Number Three has a baby. These guys should keep it simple and stick with Wife Number One!