My estate is worth millions of dollars. How do I stop my daughters’ husbands from getting their hands on it?

“We want to make sure that, in case our daughters get divorced, our hard-earned savings go to them and not their ex-husbands.”

My estate is worth millions of dollars. How do I stop my daughters’ husbands from getting their hands on it?
“We want to make sure that, in case our daughters get divorced, our hard-earned savings go to them and not their ex-husbands.”