In typical Kardashian fashion, controversy has found the relationship between James Harden and Khloe Kardashian. And the relationship has barely started.

Yahoo! Lifestyle's New Idea is reporting that an Australian student claims that the Houston Rockets star guard had sex with her just days after he was spotted in Hawaii with Kardashian.

James Harden's wardrobe is horrible on dates with Khloe Kardashian

The 23-year-old student, Rochelle Relf, told the media she didn't know Harden was a celebrity when they met at casino in Sydney, Daily Mail Australia reported, and that he seduced her and they slept together.

Relf is making their affair public because she hates cheaters, New Idea reported, and she wanted to know what a "love rat" he is.

James Harden and Khloe Kardashian spotted entering same gym to work out together

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

"I don't want to hurt Khloe," she insists. "But as a woman I think we need to hear these things and she should know the truth. James is very good at making himself out to be a loyal person.

"He is Mr. Romantic and says what you want to hear. But he is in no way ready to be settling down and it's no secret Khloe wants a family."

After Harden and Relf met in the casino, they went back to his Sydney hotel, she claims, where he showed her his Instagram account that had 1.7 million followers, including First Lady Michelle Obama. After that, the two were intimate, she said.

"He kept checking (if) I was single and asked if a boyfriend would come bursting through the door looking for me," she said. "I laughed and asked if any girl was going to come bursting through the door looking for him and he said no."

According to Daily Mail, Harden's fling with Relf took place on June 20, 10 days after he reportedly hooked up with Kardashian.