For the very first time since the scandal broke, Sheena is telling her side of the story -- explaining to TMZ how she first got in touch with the U.K. newspaper The Sun through a close family friend and was under the impression she was only doing a simple story about a spa day with her kid.
But Sheena says during the photo session -- producers asked her to pose with a medical syringe and "act like I was just holding it up."
She says she had no idea the story was going to be about Botox -- and claims she doesn't even know what Botox is.
After the photo session, Sheena says things began to spiral out of control -- and she received detailed scripts instructing her how to carry on the lie in front of television cameras.
Sheena says she still has the scripts.
Stay tuned for more video.