Brad Pitt and Angelina Jolie have allegedly added an adultery clause to their prenup agreement, RadarOnline reports.

Jolie and Pitt recently wed in France on Aug. 23 after 10 years of dating. Though the newlywed couple appears to be happily in love, their prenup states that if Pitt cheats, Jolie will get full custody of their children. [Inquistr]

"If Brad gets too serious with another woman while they are married, she'll get primary custody if they split," says a RadarOnline source.

According to the source, the prenup also states that if the couple decides to split, they "each will leave with the millions they brought into the union on their own, while anything they earn as a married couple would be funneled into a trust for their children, where the cash would be evenly divided six ways." [RadarOnline]

So why did Pitt and Jolie allegedly decide on having a prenup after already being together for 10 years?

Well, in addition to protecting their money as a reason for the prenup-collectively, Pitt and Jolie have a total net worth of $425 million. The couple allegedly feels that a prenup is "the best way to protect their kids," claims the RadarOnline source.

Brad and Angelina have also decided on their wills "which would earmark the lion's share of their savings and properties to their kids (Maddox, Pax, Zahara, Shiloh, Knox and Vivienne)," RadarOnline reports.

Brad and Angelina's wills also state that the couple will use their money to fund an undisclosed cancer research charity and will also fund the orphanages in each of the countries where they adopted their children. [RadarOnline]

Brad and Angelina's children were also a big part of Brad and Angelina's wedding vows.

"The children wrote vows and asked us to make promises to each other," Jolie told People of the couple's recent European wedding. "It was very sweet what they came up with."