Kylie Jenner’s boyfriend, Tyga, is trying to convince his girlfriend to marry without a prenup, a source told Hollywood Life. The 25-year-old rapper has been reportedly waiting for his teen girlfriend to turn 18 so he could propose to her.

Tyga and Jenner, who have been going strong despite the recent cheating scandal, are not on the same side of the prenup issue. While Tyga does not want a prenup, Jenner has reportedly promised her family that she would not get married without protecting her money.

“Kylie’s comfortable living together and she’d even go the extra mile and marry him,” the source told Hollywood Life. “But, Kylie’s not stupid. She loves her that hard cold cash and while she’s does love Tyga, she loves the money more. If and when they do get married, Kylie will have a prenup in place and it will be air tight like a coffin. She’s promised her mother, her father and her sisters that she will protect her money and the empire the family has created if she were to get married.”

However, Tyga reportedly does not want to sign the prenup despite Jenner making it clear to him that she wants one.

“She and Tyga have had this talk and she’s told him the rules. He didn’t agree,” the source said. “This is a promise that she’s made not only to her family, but to herself and her future. And she doesn’t intend on breaking it.”

Jenner and Tyga’s relationship has been recently embroiled in controversies after reports claimed that the latter was cheating on the reality TV star with transgender model Mia Isabella.

The news reportedly forced Caitlyn Jenner, formerly Bruce Jenner, warning Tyga that she does not want her daughter to move in with him now.

“Caitlyn listened and addressed some her of her concerns, like the age difference, and told Tyga it’s too soon for him to be living at her daughter’s house,” another source told Hollywood Life. “Tyga wanted to make it clear to Caitlyn that, first and foremost, he loves Kylie. He told Caitlyn that he’s not with her for the wrong reasons and that he doesn’t want her money."