Paris Hilton’s managers are becoming increasingly concerned the socialite has reunited with her pal Brandon Davis, with speculation swirling that the oil heir has even moved in with her.

Davis, who recently came out of rehab for cocaine and alcohol addictions, was slammed for launching a verbal tirade against Lindsay Lohan during a night out with Hilton in May.

But although Hilton’s aides have been keen to keep the pair apart since the incident, it appears their actions are having the opposite effect.

A source close to Hilton says, “Paris’s management has been very direct with her about distancing herself from him.”

But Hollywood publication Life & Style Weekly reports, “All his clothes, his toiletries and even some of the artwork he owns are at her place. They’re hooking up. But she doesn’t want anyone to know about it.”