DailyMail.com , court documents reveal that the power couple doesn't have a prenuptial agreement to help them navigate dividing their massive wealth. Bill and Melinda Gates together own a huge fortune including properties in five states, a private jet, an astonishing art collection and a fleet of luxury cars. Although the couple has a separation agreement signed, without a prenup, dividing the massive wealth might get difficult. A separation agreement is usually signed at the end of a marriage and lays out the terms of the split. That separation contract hasn't been included in the divorce filing. But now without a prenup, the separation agreement is likely to dictate how the couple will divide their assets. The documents, which were filed by Melinda, came to light after the couple's eldest daughter Jennifer Gates revealed their family has been going through a "challenging stretch of time."