Do you mean what can happen during the photo session? I don't know if it's intentional, but to me it all felt very much like purely functional "you scratch my back and i'll do yours" deal to get rid of the excitement from the D/S aspect of the session, but with very little of actual sexual attraction on Veronica's part. Like, the only moment where Veronica seems to get really into it in the sense she actually sees Edwin as more than flesh dildo, is when he chooses options to behave "like a girl" with all the submission, moaning and stuff.
And then on their other outing she basically needs to be drunk out of her mind to fuck Edwin. Which, again, doesn't strike me as much of attraction outside of that state.