LOS ANGELES — A woman suing Bill Cosby for sexual battery attempted to sell a story about the comedian to a tabloid a decade ago and tried to extort money in exchange for her silence, Cosby’s attorney said in a court filing Thursday.

Attorney Martin Singer wrote in the filing that the lawsuit by Judy Huth and her attorney followed a failed attempt to extort $250,000 from Cosby. In the filing, Cosby seeks monetary damages from Huth and her attorney.

The filing comes two days after Huth sued, claiming the comedian forced her to perform a sex act in 1974 when she was 15. The incident occurred in a bedroom of the Playboy Mansion after Cosby gave Huth and a 16-year-old friend alcohol, according to her lawsuit.

The filings state Singer and Huth’s attorney, Marc Strecker, had several conversations about the allegations in the weeks before the lawsuit was filed. Strecker first demanded $100,000, then raised the demand to $250,000 to keep from filing a lawsuit on Huth’s behalf, Singer wrote.

“Your demand for money from Mr. Cosby is rejected,” Singer wrote in a Dec. 1 letter filed with the court.

Her lawsuit stated she only recently discovered she had suffered psychological damage as a result of the incident.