Judy Thompson has told the Associated Press she was thrilled when Cosby agreed to mentor her teenage daughter Jennifer in the late 1980s, and had no reservations when the funnyman agreed to help the 17 year old as she embarked on an acting career.

But now Jennifer Thompson is among the 20-plus women who have accused Cosby of making unwanted sexual advances - she claims she was forced to perform a sex act on the comedian.

Jennifer says, "It basically shattered my faith so that anything that used to look promising to me, I saw it through a different lens."

Judy Thompson explains she felt compelled to write to Camille Cosby after reading a statement from her about the sex assault allegations, during which the comedian's wife said, "None of us will ever want to be in the position of attacking a victim, but the question should be asked - who is the victim?"

Thompson says, "This letter was written from my heart. (I said), 'Your husband crossed boundaries that never should have been breached. He shattered her (daughter's) innocence... May you and Bill speak the truth and be afforded peace for your souls... To be so hurt and violated, and then not be believed! Resolution has not been easily forthcoming. We all remained in the shadows of your husband's sick behavior."

Jennifer Thompson was one 13 so-called Jane Does mentioned in a 2005 civil suit that was brought against Cosby by Andrea Constand, a former Temple University employee who claimed Cosby drugged and sexually assaulted her in 2004.

Constand later settled out of court.

More than 20 women have stepped forward in recent months to accuse Cosby of various sex crimes, ranging from unwanted advances to sexual assault and rape.

Cosby has never been charged with any crime.