"Keeping Up With The Kardashians" star Kylie Jenner and her beau "Rack City" rapper Tyga have just made up after their brief split, but word has it that the couple is fighting again, not because of cheating, but because of money.

According to a Hollywood Life source, the famous on-again-off-again couple is having problems in the money department because the 26-year-old rapper owes Jenner about half a million dollars and she is said to be "upset" that she has to shoulder her beau's expenses.

"Kylie's been aware of Tyga's financial problems since she began dating him," the source told the publication exclusively. "Thus far, Tyga's tab is close to half a million dollars and counting."

The source reveals that Tyga's debt includes his long overdue rent amounting to $130,000 as well as the cash he uses just to keep up with the Kardashian-Jenners' lavish lifestyle. Contrary to earlier reports saying that the couple broke up because of Tyga's alleged cheating, the source added that their brief split last week was in fact also because of the rapper's financial problems.

Furthermore, the source said that the 18-year-old was dismayed of the fact that she had to pay "for his travel arrangements, insurance, payments on his cars and just loaning money in general."

Little Jenner's beau was reportedly dissed back in June by her brother-in-law Kanye West when the news of his unpaid rent hit headlines. According to a Hollywood Life source, the 38-year-old rapper said that Tyga should stop living like Oprah and he should live within his means.

"Kanye thinks the world of Tyga. Kanye thinks Tyga is talented beyond belief and a gentleman, whom he considers family because he's with Kylie [Jenner]," the source shared to the publication. "Kanye, however, doesn't like Tyga's over-the-top lavish lifestyle. Kanye told Tyga he needs to 'tone that s*** down' and 'you're not Oprah, so stop fronting and pretending like you have her wallet.'"

But it seems that Tyga has not taken West's unsolicited advice as the rapper has been recently reported to be looking at some mansions after he moved out of Jenner's home. According to TMZ, Tyga has his eye on a $10 million mansion; however, even after he has gone into escrow three times, he doesn't close the deal as he gives out reasons for flaking out.

"We're told each time it gets close to closing, Tyga's got excuses -- such as being on the road or not getting paid -- for coming up short on cash," the report reads.

The $10 million mansion is an eight-bedroom pad located in Calabasas, California where momager Kris Jenner, Kim Kardashian and Kylie Jenner live close together in separate homes.