We're not sure if we would be as confident as Karrueche Tran is in her relationship with Chris Brown. amid rampant rumors of a romantic (or at least musical) reunion with ex girlfriend Rihanna. Sources told TMZ that she and Brown are going strong.
Pals of Tran told the site that she and Brown are actually living together. We're guessing she was okay with him attending Rihanna's birthday party, then? Apparently she was -- because he came home immediately afterward and took her to Miami for Valentine's Day. Sources also said that Brown "professes his love everyday" to Tran and doesn't have any plans to leave her for RiRi.

If all that is true, Tran must have a ton of patience. Brown and Rihanna reportedly spent four hours together in her dressing room during Grammy rehearsals and have been sending loved up tweets to one another for ages now.

In fact, it appears that Tran may be a coverup for Brown and Rihanna's not-so-secret romance. “Rihanna knows everyone will judge her, and even her family and closest friends do not want them to be back together," a source said in January. "Rihanna is afraid if she is seen with Chris it will have a negative impact on her career. She is definitely torn. And most likely she will choose her career over Chris.”

“There are still feelings between them both and they do still speak with each other quite often,” the source said. “The times they have been in the same building at the clubs the last couple weeks were never a coincidence. They always know where each other will be and would hang out more but they don’t want to be photographed together.”

While they may not want to be photographed together, apparently a duet wasn't out of the question. Brown is the feature on Rihanna's 'Birthday Cake' remix.

On the bright side for Tran, though: If the pair have been hooking up, at least one pal said it isn't serious. Plus, it isn't Rihanna's face he has tattooed on his arm.