Lindsay Lohan LLOHANRILEY101107_02.jpgLindsay Lohan may be done with drugs and drink, but she's sure not done with scandal! Us Magazine is reporting that Lindsay's not-so-secret rehab boyfriend Riley Giles left his fiancee for the embattled actress - and even made the poor girl find out about it via the tabloids! "Riley just stopped calling Bree [Tierney, Giles' former fiancee] and never told her about Lindsay," the magazine quotes the fiancee's mom as saying. "She found out by seeing photos. It destroyed her."

The same article also reports that Riley took Lindsay to the Hotel Bar & Nightclub in Salt Lake City - on the very same day she checked out of rehab! (To be fair, the magazine also quotes the club's owner as saying "Her group made it clear they didn't want any alcohol at the table.") All of this is giving us some serious doubts about Riley - we'd hate to see Lindsay lose all the progress she's made so far already!