Khloe Kardashian and James Harden's relationship is allegedly on the rocks.

Apparently, the NBA player cheated on the "Keeping Up With The Kardashians" star with a Philadelphia stripper named Nelly Wit Da Jelly.

Khloe Kardashian reportedly confronted James Harden, which resulted in a row.

"They had a terrible fight after Khloe confronted him and demanded the truth about who he's been seeing behind her back," a source close to the "Keeping Up With The Kardashians" family told Radar Online.

"James isn't the type of guy who'll sit back and take sh*t, and they really got into it. He threw it back in her face the fact that he knows she's been creeping around behind his back with her ex [Lamar]," the source added.

Apparently, James Harden has had enough of Khloe Kardashian's indecisiveness when it comes to their relationship.

"James really put her in her place - she was the one calling all the shots, but she doesn't know what she wants," the source dished out.

"One week she wants his baby, the next she's having second thoughts about Lamar, then she wants to be exclusive, then she doesn't, he has no idea where he stands with her, nor is he the kind of guy who likes drama around him."

It's not clear whether Khloe Kardashian is sticking with James Harden despite his alleged affair with Nelly Wit Da Jelly. However, this is not the first time that the NBA player has been rumored to be cheating on the reality star.

Before rumors about Nelly Wit Da Jelly came out, it has been previously reported in July that James Harden has reportedly cheated on the "Keeping Up With The Kardashians" star with an Australian student.

"Khloe was with James in Hawaii, then he flew to Australia and spent the night with me," 23-year-old Australian student Rochelle Relf previously told New Idea. "He was charming, affectionate - he asked me to visit him in America and told me he was a single guy."