Text From Brown’s Mistress Ignited Rihanna Beating

Brohannagate ‘09 is gathering much speculation since Sunday’s release of Chris Brown from a Los Angeles jail after assaulting and threatening the life of girlfriend Rihanna, and it appears the altercation was sparked by a text message from another woman he’s probably fucking.

“He got a booty call. He got a text. Rihanna saw it and she got upset. They started to argue. She got out of the car. He wanted her to get back in, so he grabbed her,” the industry source said. “She pulled away. That’s when she’s told people he hit her.” The Barbados-born beauty had “visible injuries” when cops arrived, and she’s been cooperating with the investigation ever since, while freezing out Brown. Cops and sources say the two were driving a rented Lamborghini on a ritzy street south of Rihanna’s pad in the Hollywood Hills early Sunday when they quarreled, parked, got out and “the argument escalated.”

Cops responding to a 911 call found the “Umbrella” singer with a split lip and contusions on either side of her forehead, according to People. “She looked distraught and in a lot of pain. Her eyes were closed because she was looking down,” a police source who saw photos told People. Rihanna also reportedly had bite marks on her hand and was treated at Cedars-Sinai Medical Center.