Actress Keira Knightley was happy to film a sex scene for new movie THE EDGE OF LOVE - even though the naked romp was written by her mother.
The movie's screenplay was penned by Knightley's mum, Sharman MACdonald, who also served as a producer on the project.
Knightley insists that knowing her mother is capable of writing about steamy clinches didn't faze her and she was happy to strip off wherever necessary.
She says, "She dared to put a sex scene in it. It didn't worry me that my mother knows what sex is.
"Come to think of it, I was found under an apple tree. My mother is a virgin. I had no hissy fits when she presented me with the scene."