" I think Cali law is if you get married then after ten years your spouse gets half of everything, even if you have a prenup."
That's scary
No wonder she hasn't divorced him.
Had they lived in any other state, she would've been long gone.
They got married in 1955. It's been said they became estranged in 2012, so maybe she's just been waiting for him to die so that she gets more than half.
They probably figured they would lose more than they would gain in a divorce. I bet they had a Bill and Hillary relationship for at least the last couple of years. Keep in mind that while his name may be at the forefront of their businesses, she was very active in the accumulation of their wealth. She was never some trophy wife who married some guy 20 years older than her, and stuck it out for him to die, or to be married for just long enough to be set for life.
That being said, in most cases, of marriages where either there are children involved or it was a long term marriage (say 10 years), the assets should be split; after that amount of time together, it is more than likely that they supported each other enough in some form that they each contributed to each others success.