Jason Cheats On Britney

Britney Spears relationship with Jason Trawick is about to unravel!

According to Star, Jason has been carrying on a long-term affair with a brunette behind the singer's back! The other woman is actress and author Jessica Steindorff who met Jason in 2007.

"Jason has been cheating on Britney with Jessica from the beginning of their relationship," a close friend of Jessica's reveals to Star. "He has deceived Britney with his lies for too long, and somebody needs to tell her the truth, even if it hurts."

"He was always telling Jessica that he had broken up with Britney so it was OK that they were sleeping together," the friend tells Star.

Star posted secret emails exchanged between Jason and Jessica, including one from December in which Jason wrote: “Miss you. Best u left. Just wanted a kiss.”