Kylie Jenner is allegedly spying on Tyga. According to a report from Radar Online, the "Rack City" rapper is supposedly only using his rumored girlfriend to have free rent.

The 17-year-old "Keeping Up with the Kardashians" star reportedly began to be doubtful of Tyga after the 24-year-old hiphop recording artist was recently seen in a limousine with a hot blonde. The teen star supposedly asked help from her "momager" Kris Jenner to keep track of her boyfriend's whereabouts. 

"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," a family insider revealed.

"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 insider added.

Aside from the Kardashian-Jenner clan, a related report from Hollywood Life said that Blac Chyna is also trying to expose how Kylie Jenner is only being used by Tyga.

The young couple were recently spotted at the new $2.7 mansion of Kylie Jenner amid rumors that Tyga owes his landlord up to $80,000 in unpaid rent.

With the rapper's alleged financial woes, the former girlfriend and mother of Tyga's two-year-old son King Cairo claimed that the rapper only wants to live rent-free in Kylie Jenner's new mansion.

"If she can't see that Tyga's using her, she's even more foolish than she looks," a source said.

"But, hey, Blac doesn't care. She's not interested in using her dollars to take care of a grown man. King is her [Blac Chyna's] baby and her money goes to support him, not a 25-year-old man.

"More power to Kylie, though. She's getting played and Blac wouldn't ever stand for that," the source added.