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Rose McGowan guest stars on "Law & Order: SVU"

Rose McGowan attends the Max Azria Fall 2011 fashion show during Mercedes-Benz Fashion Week on Feb. 13, 2011, in New York. Getty

(CBS) Rose McGowan showcased her abilities as a sultry manipulator on last night's episode of "Law & Order: SVU" as Cassandra Davina, a con-artist playing the victim to her allegedly jealous ex-boyfriend. (SPOILER ALERT)

Pictures: Rose McGowan

Detectives Stabler (Chris Meloni) and Benson (Mariska Hargitay) follow Cassandra to her favorite local hang out - a swinger's club. Cassandra displays her seductive powers as she tries to woo Stabler, even after she is arrested.

After a surprising turn near the end of the episode, the police discover that Cassandra has been fooling them all along. She is not the victim of a stalker ex-boyfriend - she's been scamming middle-aged men into giving her money, all while she carries on an incestuous relationship with her twin brother.

McGowan is sticking to her famed femme-fatale roles, following her most well-known role as Paige Matthews in the TV series "Charmed."

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