Kylie Jenner wants to know more about Tyga’s “extracurricular activities” after he was spotted taking a Limousine ride with a blonde woman last week. A report by Radar Online, cited a family source as saying that the 17-year-old Jenner has granted permission to her mother Kris Jenner to track Tyga's activities.

“Kylie’s been in denial about Tyga’s extracurricular activities and everyone’s really struggled to convince her he’s not the perfect guy she thinks he is,” the source told Radar Online, adding: “She now wants to find out the truth for herself and has taken up Kris’s offer to have him followed.

“She wants to know where he goes, who he’s with and for how long when he’s not with her. It’s tearing her up inside and she’s terrified about what she’s going to find out.”

The relationship between the two remains a concern for both the Jenner and the Kardashian families. Late last month, reports said that Tyga got involved in a fight in Geneva with a club owner, where a gun was drawn. While Kylie, the daughter of Caitlyn Jenner, formerly known as Bruce Jenner, was reportedly unmoved, Caitlyn came to tears after hearing about the incident.

There is also a virtual battle between Kylie and Blac Chyna, the mother of Tyga’s two-year-old son King Cairo. A report last month said that Chyna had asked Tyga to “keep Kylie away” from their son after she saw pictures of King Cairo at Disneyland celebrating the birthday of North West, the daughter of Kim Kardashian and Kanye West, with Kylie and her family.

“Blac told Tyga that she does not want her son to even be around Kylie, but there is nothing that she can really do to stop this,” an insider told Radar Online, adding: “[Kylie] does not know the first thing about being a mother because she really has had no good role model to learn how to be a mom.”

Kylie and Chyna also have been poking fun at each other by posting similar photos on Instagram, including one where Chyna sported giant wax lips to mock Kylie.