Chris Brown's girlfriend Karrueche Tran doesn't mind if her man Tweets Rihanna or spends time with her because they have an open relationship. A source tells Radar Online: "Karrueche has told friends that they have an open relationship. She never asks him about Rihanna, ever." Chris takes "several days" to call her back sometimes "and that is OK with Karreuche."
... Uh, I was going to say that Karrueche is dumb, but we didn't know about her aspiring model a*s until she began dating Chris, so she's actually pretty smart!
The source says that Karrueche isn't going to let Chris spending time with his ex come in between what she has with him. Chris and Rihanna "have probably hooked up no more than half a dozen times in the past year," an insider claims.
The source says that Karrueche is "clearly enjoying the attention and notoriety she is getting being his girlfriend." I bet she is!

















































