LOS ANGELES – The Playboy Playmate being sued for trying to sell a personal sex video she made with Colin Farrell was sweet-talking the star on the phone while trying to market the raunchy tape behind his back, new court papers reveal.

Sexy Nicole Narain schmoozed Farrell with the promise “she did not want the tape publicly disseminated and that she would join him in attempting to prevent distribution,” according to a declaration filed by Farrell’s lawyer, Martin Singer, in L.A. Superior Court.

But at the same time, Narain, 31, who dated the Irish actor 2-1/2 years ago, was actually in cahoots with media broker David Hans Schmidt, who was planning to market the 15-minute sex-romp video for profit, the declaration says.

The broker scoffed at Farrell’s claim that Narain told him she wanted the X-rated tape kept under wraps. “Schmidt told me that was not true,” Singer’s declaration says.

Schmidt apparently tried to scare Farrell into joining the marketing effort quickly or risk ending up like Paris Hilton, who didn’t make a dime when her sex-ploits with ex-boyfriend Rick Salomon wound up on the Internet. “The history of past sex tapes have shown us the importance of controlling distribution prior to any piracy – ask Paris Hilton & Co.,” Schmidt wrote in a July 13 E-mail to Farrell’s agent, Josh Lieberman.

Schmidt told Farrell’s reps a copy of the steamy video had somehow been “stolen” from Narain and was bound to turn up sooner or later. Farrell sued Narain, Schmidt and Paul Nash, a reputed Internet porn exec, seeking a permanent court order to stop sale or distribution of the tape and unspecified money damages for invasion of privacy and other offenses.

In his own declaration, Farrell – who starred in the epic flop “Alexander” and will soon be seen in a big-screen version of “Miami Vice” – said he feared “injury to his reputation, loss of acting jobs, [and] endorsement deal opportunities” if the tape sees the light of day.

Judge David Yaffe has granted a temporary restraining order to keep the tape off the market. Another hearing is set for Aug. 10.