When Annabella is on the phone to Dr. Carlo Martora, it cuts back and forth between them, during one of the cuts back to Annabella, the background behind her looks completely different and the lighting is darker around her.
When Annabella is playing chess while listening to her brother's cassette informing her of the final conspirator, she is wearing a light blue dress that goes over her shoulders, naturally to cover up the straps of her bra. In the love scene with Dr. Carlo Martora afterwards, it is shown that her bra is removed. Then after the love scene, when Annabella is putting her dress back on, it doesn't go over her shoulders, showing that she has not put her bra back on.
When Annabella is having her stomach kissed by Ariella in the shower room, she places her hands on Ariella's shoulders. There is a fade to a different angle of her stomach being kissed. During the transition, it is clear that the director has said cut because Annabella breaks out of character and takes her hands off Ariella's shoulders. Then after the transition, Annabella's hands are still on Ariella's shoulders while her stomach is being kissed from a different angle.
When Annabella is kissing and feeling Ariella's body in the shower room, it begins to fade to the next passionate scene between them. During the fade, it is obvious to see that the director has said cut because Annabella breaks out of character and moves away from Ariella.