[NSFW] Is this invasion of privacy with a sex tape? [Details within]?

Names have been changed to protect the unwise

”Darius” always wondered what it was like when he had anal sex with his g/f “Sheila”, so they got a strap-on and lubed him up good and went at it. Darius discovered the sensation was not all that bad and something to explore further. They loved capturing the action with a digital movie camera so they captured at least 2 sessions with her buggering him (and the light was said to be good and the camera a quality one so no mistaking who was in it). So, many months later he breaks up with Sheila and soon surfaces with another girl, ”Meg”. Sheila is furious. She told Darius to dump Meg and come back to her of she would let the tape loose on the Internet after getting a copy to Meg. Darius calls her bluff and she manages to slip a copy to Meg and then posted it to several amateur porn Websites. Can he sue? Even though he was a willing participant in the creation of the video he did not sigh on to having it plastered on adult sites. Since she had custody of it was she free to do with it as she pleased? Her slipping a copy to Meg against Darius’ wishes was that also a violation of his privacy and could he sue Sheila for that; emotional pain and suffering because she sabotaged his new relationship? Or is it a case of caveat emptor, be more careful what you put on video and who ends up with it?