This forum is so wierd, and why I rarely actually post. My "what is essentially cheating" has turned into "THERES CHEATING". I don't actually care if there is technically cheating or not, and I did state it occurs by way of blackmail and revenge. So if those tags outwheigh the cheating tag, then cool. Forum members are free to try the game, regardless of tags or comments. I didn't "report" anything. I made a comment on forum for others.Except it's not cheating.
And coming back and going 'GUYS THERE'S CHEATING THERE'S CHEATING' and reporting it as such, is well, 1... no it's not you're misreporting: the main character is not seeing it as cheating, so it's not cheating (his problem is that the character involved is being hurt), and 2... there is blackmail, so the blackmail tag is now valid, but that's it, and 3... it's not like the dynamic came out of the blue. This isn't the first time an antagonist character came in and started doing kinkybdsm stuff using blackmail or power dynamics or whatever.
The involvement of a strap-on in the equation doesn't change that.
Again, there was a scenario that could be uncomfortable for some. A harem member was complicit in cheating within the story, regardless of how the MC views it (which I am uncertain why you think the MC is okay with it when the MC in currently unaware). It was a non-harem member and the MC was not present. This forum often helps others by stating what is in the game so players can avoid/skip. I made the statement so players can be aware of what they are getting into. Some players may even be attracted to game more based on the scenario.