Another woman who accuses Bill Cosby of raping her has come forward.

Joan Tarshis wrote in an essay on Hollywood Elsewhere that the actor and comedian drugged and raped her on two occasions, both in the fall of 1969. At the time, she was just 19 years old.

Tarshis met Cosby through mutual friends. She said Cosby “seemed to take a liking” to her and one day invited her to help him write some material after he was done shooting The Bill Cosby Show for the day. He gave her what she thought was a Bloody Mary topped with beer.

“The next thing I remember was coming to on his couch while being undressed,” she wrote.

The second incident occurred a short time later at the Sherry Netherland Hotel after Tarshis attended a theater event of his to which he had invited her. It was only after this second rape that Tarshis vowed she would never see Cosby again.

She said what led her to put herself back into a situation where she could be attacked by him once more, and what held her back from discussing the rape, was a combination of disappointing her mother, who was proud Cosby seemed interested in Tarshis’s writing ability, and guilt that she had let the rape happen.

Thursday last week Cosby canceled an appearance on Late Night with David Letterman after Barbara Bowman came forward to the Washington Post to say she had been raped. Cosby did interview with NPR Saturday but refused to discuss the allegations.

Cosby through his attorneys has repeatedly denied allegations, reported CNN.

The total number of women to come forward to say the comedian sexually abused them in one way or another is now 13.