Since it was in a discussion about the preview pic, your oneliner was a bit on the lean side, so to speak.

But,
a) thanks for the clarification and b)Discord is an annoyance, IMO, so I am rarely there.
Agree with you that it is some kind of cheating and you can see in one of my last posts that I also say that those who do not want to commit to Hana 100%, they should take the FwB choice. Problem solved, since it is pretty clear we can commit to Hana later too, if we want to do so. And the FwB does not hinder you to pursue e.g. Felicia and it helps with high point Sophia (if you chose her), since we can see growing closeness and budding relationship there.
It is simply that an orgy participation Edwin could rationalise for himself and Hana in this specific case.
In m Hana playthrough I chose girlfriend and try to keep sexual encounters with others to a minimum, the club related stuff. In playthroughs for example with Felicia or Sophia in the focus, I chose FwB which is honest with Hana. They are friends, like each other and there is sometimes a bit more, but a relationship might or might not happen in the future.