Here’s one possibility:
Elliot is worth about 55 million. If she divorces him now, she gets slightly more than half, say 30 million.
When daddy passes (he’s 83 years old), the Elliot family will receive a good sized chunk of his 555 million dollar estate.
A divorce at that point would be worth a whole lot more.
I’m not saying it’s true. I hope it’s not, but it is a possibility that she must have considered.
Inherited money is not community property until it is commingled or shared. His dad’s fortune is not hers nor should it be.