LINDSAY LOHAN: STAIRWELL SEX IN REHAB!

Breanna Tierney, the ex-girlfriend Lindsay's rehab lover spill the beans!

"Lindsay Lohan stole my fiancé and wrecked my life! Riley went into rehab to get his life together and in the process meets Lindsay and ruins my life," she told The ENQUIRER. "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. 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. I've stuck by Riley through the good and the bad. We lived together for three years and planned on being together forever. But when he finally confessed to me that he had sex with Lindsay in one of the stairwells at Cirque — that was it, we were done. Lindsay has no morals and needs some serious help — besides drug rehab — for all her other problems."