That's the movie all right. But the description and the settings have me confused. For example, the middle picture of Seka playing "Seka" is the "********" scene with Paul Thomas. Paul Thomas plays "Michael" and he is Seka's therapist. However, it's where she is ********** with the pendant but it's not after the wedding scene which has me confused. It's before.
The pendant / ******** scene occurs at 10:55 in Blerik's film attachment. The wedding scene, with Ken Scudder (credited as Ken Rudd) playing "John" as the ***** and Bonnie Holiday playing "Robin" as the bride happens much later at around 11:47 to about 16:29. Seka isn't quite observing the scene, she's reacting to it under ********.
After the wedding scene, Paul Thomas continues the therapy session with Seka. But this time he puts her in a trance just by asking her to close her eyes. She then observes under ******** another scene with Michael Morrison as "Sandy" and Sonya Summers as "Young Seka" on a big motorcycle.
It's all there in Blerik's film. Good job Blerik.