Okay so. If I had to be realistic and think of how Airi would go about this.
Shinobu is going to tell his boss he needs to think on it OR talk to Fumi about it to see if she's okay with it. The producer may not like the answer but he'll accept it.
Fumi upon hearing of this will be unsure, but choose to do it so long as Shinobu is present Incase anything goes wrong.
Expected bait happens, Shinobu likely saving Fumi again. Movie is done.
On Sakura's end..
She accepts the sex scene offer. How she accepts it is anyone's guess, but the end result is the same.
She acts the movie. Plays the sex scene. Sakura feels good. REALLY good. No sex but heavy foreplay when it comes to touching. She's seen as a natural. Gets praise for it, encouraged to do more. She feels good about it.
What a coincidence!! Shinobu's movie is another success! Producer says it's due to the nude scene. Wants Shinobu to do another movie with a sex scene. Fumi is unsure of this one so doesn't want to partake in it.
THIS gives the opening for Sakura and Shinobu to meet. With Sakura riding that high from the first scene.