The former fiancee of new Lindsay Lohan beau Riley Giles has sold her story to the tabs. The twenty-two year old scorned blonde spills the beans on Riley and LiLo’s tawdry rehab affair; including sex in a rehab stairwell. And cheap the twenty-five year old skaterboy’s penchant for cubic zirconia.

“Lindsay Lohan stole my fiancé and wrecked my life!” “I loved Riley, and Lindsay stole him from me,” Breanna (or Bree) tells Star.

“Even after a car accident in Las Vegas, when Riley was arrested and I was left at the scene. That was his third or fourth DUI. We knew then he had to get help. So he went into rehab, and I waited for him. We lived together for three years and planned on being together forever. But when he confessed that he had sex with Lindsay in one of the stairwells at Cirque — that was it; we were done.”

“I loved Riley and Lindsay stole him. I met her at a meeting while they were still patients at Cirque, and I just knew something was up.”

“Lindsay has no morals and needs some serious help — besides drug rehab — for all her other problems.”

“She came into the meeting with Riley, and she comes over and sits next to me, being overly nice. She was complimenting me on my hair and trying to be my friend. It didn’t seem sincere at all.”

“A few days later, I get a text message from Riley telling me he wanted to ‘take a break.’ I knew instantly it was because of Lindsay.”

Bree was also stunned to discover Riley had given her a fake diamond engagement ring.

“I went to get it repaired because some of the diamonds fell out. I wanted to scream when the jeweler told me the stones were cheap cubic zirconias.”

“There’s no way they are going to last,” she says. “I know Riley well enough to know that every action he takes is to benefit himself. He’s just looking for publicity. He’s got Lindsay to get attention for his so-called snowboarding career. He’s using her and she’s using him — nice, huh?”