Well - I must say that scene took me by surprise too. It would be nice if that part was made skippable for those that really can't stand it. However, in my eyes it was just a bit role-playing, and I think if the MC really could stop it at any moment, and she would stop too. Personally it does not bother me very much, although it's not really my taste. I won't skip the scene myself, because it's interesting enough to see how they both play around with it.
Side remark: If anything, you could see it as a bit playful "bite back" for all those VN's where the MC use hypnosis, violence, rape and more of that "nice" stuff to let the girl be used by him. But that's beside the point and has nothing to do with this subject (yeah - Shoot me for that).
Anyway - A said, If you could skip that scene it would be nice. Personally I think it's a one-thing only, and just a bit mischievous teasing by that girl. After they got caught it was over fast, and the scene turned into something more interesting. I did not get any femdom vibes from her in the earlier scenes, so I think she was just playing around just to see how the MC reacts.
Anyway - I am looking forward to the new developments in the future. And Olivia is my favorite at this moment. However, let's see how the situation around the childhood friend turns out. So far I really like this VN.