Read the story and use your brain a little. I'll break it down for you, since you haven't noticed it yet:
- an event at a club on the dance floor, where Sai and VI flirt; the author makes it clear that there is sexual attraction between them.
- then there is a dialogue between Eric and Vee where they come to the conclusion that we'll call it an open relationship. - After this, there's a scene in an alley, and OH MY GOD nothing happens (put the first and second points together), and it's logical that Vi would give Say a blow job. But no, let's assume she didn't dare.
- but the next day, without any remorse or hesitation, she's ready to suck off a guy she's seeing for the first time in her life!!
If the photo shoot were just with V and Bruce, great, no questions asked, but sex with a random guy doesn't fit into the plot at all.
You will understand only if you read the story carefully. LOL