Karrueche Tran thinks Chris Brown is "immature".
The 26-year-old model - who recently split from the 'Loyal' hitmaker - was branded a cheater by her on/off boyfriend, who accused her of dating Drake whilst Chris was in jail.
A source said: "Karrueche's not a cheater, a heartbreaker or a liar.
"She thinks Chris is being really immature and trying to make her feel awful and basically destroy her character by saying she hooked up with Drake."
The insider also explained that there is no truth to Chris' claims or he wouldn't have acted so friendly with the 'Hold On, We're Going Home' hitmaker.
The source continued to HollywoodLife.com: "If he really thought that, he wouldn't have done the ESPYs with him, he wouldn't have done interviews praising him, and he certainly wouldn't have been with Kae when he was released from prison.
"He's on one right now and Karrueche's glad she doesn't have to be in his face right now as he has yet another one of his out of nowhere tantrums."
Meanwhile, the 25-year-old singer recently apologised to his ex for "airing out" their personal life on social media.
He wrote: "Being young and dumb is one of my strong suits and emotional at best. I love hard and react impulsively when I'm hurt at times. I don't think social media is a place to air out or hash out personal problems and a n***a feel hella WACK for doing it.
"So I AM APOLOGIZING I live in a glass house and the same s**t that makes me great also is my curse. Everybody know I love that girl. I don't care how my image my look to the public because I'm still gonna be the best at what I do. I just want baby girl to know I apologize!(sic)".
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