Chris Brown, Rihanna dating rumors: Karrueche Tran wasn't reason for break up, but drugs and rehab was?

Karrueche Tran was not the reason why Rihanna broke up with Chris Brown.

According to MediaTakeOut.com, a source close to Brown's mother Joyce Hawkins dished that the "Diamonds" singer didn't like the singer's alleged association to OHB gang and sever drug habit.

"He wouldn't get help for a drug problem, so she [Rihanna] gave him an ultimatum and left."

Rihanna and Hawkins have remained close to each other after the countless make-up and break-ups, and both ladies want a relationship to blossom after his rehab despite the Drake dating rumors.

"I think Rihanna is just trying to TEST Chris, to see whether he acts out over it, or whether he handles it well. That will prove to her whether he's really changed."

Rihanna's recent behavior seems to send a different signal as she is seen frolicking throughout Europe wit Brown's enemy.

Should Rihanna go back to Chris Brown?