Momager knows best.

It's always nice to know that your mum has your back, especially when it comes to matters of the heart. For most people that means a mum hug and a nice dinner you when you've been dumped but for the Kardashian-Jenner gals, it means mum Kris being involved from the word go. A source has revealed that anyone who wants to go out with any of her daughters has to sign a hefty contract saying that they can't bad-mouth the family after they break up. "It’s essentially a non-disclosure agreement, usually around 100 pages long," the insider told The Sun. "It also ties up copyright of any pics or videos taken during the relationship. "Basically they can’t sell stories on the relationship or speak badly about them in public. "It’s also accompanied by a handwritten letter from Kris letting you know she will turn to the family’s team of lawyers should break the agreement. If that weren't enough, Kris has her boyfriend Corey deliver the contract to the lad in question. “These days it’s usually Corey Gamble who turns up at their house to present it to them. “The girls know the deal – it’s written into their TV show contracts too. They can’t date anyone who hasn’t signed it." And we thought Irish mams were intense...