A woman who accused Bill Cosby of sexually assaulting her at the Playboy Mansion in the mid-1970s took the witness stand on Tuesday in a civil lawsuit. She said the actor and comedian forced her to perform a sex act when she was a teenager.

Judy Huth, who is seeking unspecified damages, said she went to the famous mansion in Los Angeles at Cosby’s invitation after she and a friend met him days earlier at a park where he was filming a movie.

When she emerged from a bathroom, Huth said she saw Cosby sitting on a bed. He patted it and she sat next to him, she said...