"The guy who owns Cliffside slacked on the rules for Lindsay, but they got cocky with their relationship and people got uncomfortable with the situation, saying they couldn't do that stuff when people are trying to get well."
The mystery man was sent to a all-male treatment facility, but the pair are reportedly still enjoying their romance.
The source added: "They're still together now. They go to meetings outside and she meets him there. She still talks to him every day."
The affair has come to light a day after it was discovered Chaka Khan had been at Cliffside at the same time as Lindsay, but left because of her "diva behaviour".
She has since responded on Facebook, writing: "To choose to do what is necessary to better one's self is commendable. I applaud Lindsay Lohan for doing the work. She is a lovely young lady and I pray for her well-being."
- Bang! Showbiz
