Marianne Faithful admitted the "painful" reason why her relationship with Mick Jagger ended in 1970.
The '60's singer dated Jagger for four years, and even co-wrote the song "Sister Morphine" which is found on the Rolling Stones' famed "Sticky Fingers" album.
However, Faithful's relationship with the Rolling Stones front man was destined for failure because of her mother's attitude toward men.
After tracing her roots through the BBC's "Who Do You Think You Are" television series, the singer realized that both her mother, Eva, and her grandmother were raped by Russian troops in Vienna during the end of World War II.
"Eva never got over it and always hated men and passed it on to me," Faithful explained to The Sun. "She wouldn't even have realized it- it just happened."
As a result, Faithful's relationship with Jagger never got serious.
"He loved me and I loved him, but something in me compelled me to just walk away," she recounted. "I don't really know why. I had to move on. It was very painful and very, very hard as I loved him. I think my mother- the way she was with this unspoken loathing of men- had a huge affect."
Trying to reconcile her feelings for Jagger and keeping up with the lifestyle of the '60's era was Faithful's biggest challenge.
"It was a big problem for me in the '60's, especially as I had to pretend everything was so wild and sexual and it really wasn't."
Furthermore, Faithful was unable to find happiness with a man until much later in life.
"The trauma and horror was life-long," she admitted, according to The Sun. "It took until I was 50 to be in a relationship, to be in love and to not have to take drugs or drink to have sex."
Meanwhile, 66-year-old Faithful's episode of "Who Do You Think You Are," in which she visits Vienna, Austria, will air on BBC One on Sept. 18.
Just as Faithful had moved on following her breakup with the Rolling Stones singer, Jagger went on to marry Bianca Jagger in 1971, but the pair split in 1978.
In 1990, the "Brown Sugar" singer married Jerry Hall, but was divorced again after nine years.