Note to billionaires: if you plan on getting married, don’t forget to sign a prenup! 

Amazon CEO Jeff Bezos and his wife MacKenzie announced this week that after 25 years of marriage, they’re getting a divorce. But come to find out, the two never signed a prenuptial agreement, which means they’ll likely divide Jeff’s $137 billion net worth. 

According to TMZ, Jeff and MacKenzie (who is an award-winning novelist) live in Washington state, a “community property state,” which means divorcing couples without a prenup split assets 50-50.

MacKenzie could fetch as much as $66 billion based on the value of the company today, according to CNBC.

But here’s the thing. To fund a settlement of that magnitude, Jeff would have sell or pledge shares, which could dilute his ownership and control of the company. CNBC reports that he owns just under 80 million shares, or just under 16 percent of Amazon. 

“We want to make people aware of a development in our lives,” Jeff tweeted, announcing their separation. “As our family and close friends know, after a long period of loving exploration and trial separation, we have decided to divorce and continue our shared lives as friends.”

“We feel incredibly lucky to have found each other and deeply grateful for every one of the years we have been married to each other. If we had known we would separate after 25 years, we would do it all again.”