American singer Chris Brown recently got twerked on by Amber Rose at Supperclub in Hollywood.

According to a report in Hollywood Life, Karrueche Tran was not happy seeing Wiz Khalifa's former wife getting intimate with the Loyal singer, and thought it was "way out of line."

"Karrueche thinks less of Amber and thinks she's way out of line for grinding on her dude like that. You'd never catch Kae flirting with Wiz [Khalifa] or anyone Amber's slept with. Kae is a real classy woman, unfortunately, she can't say the same for others," the source said.

breezy x amber. #chrisbrown #amberrose ?

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The Say Goodbye singer reportedly started dating Tran amidst his romance with Rihanna. The two briefly split in October 2012 when Brown admitted he was "in love with two people."

However, if Brown does not stop his partying ways, he might lose the 26-year-old model forever.

"Karrueche sees Chris out and about, partying around town, and getting close to Amber Rose. She sees it, but this time, she's not letting his childish games manipulate her. She's not saying she doesn't love him or that she doesn't want to be with him, but she just isn't falling for his games," another source told the website.

"As far as Amber is concerned, Karrueche isn't mad at her. If Amber's that thirsty and wants to sleep with Chris, she can go ahead, he's all hers. But if Chris falls for Amber, Karrueche will be done with him. She'll be completely done and will never speak to him again!" the insider added.

In September, Rose shocked everyone when she filed for divorce from Khalifa, just after a year of marriage, citing irreconcilable differences.

Later, the 30-year-old model, who has one-year-old son Sebastian with the rapper, revealed that he cheated on her, which led to their split.