I get what they were trying to do with that NTR scene, they wanted to showcase how much of a wimp the wimp is without the other (honestly more fun) personality, but they could've definetely gone about it in a better way. Maybe by replacing Mary with Tiffany (since it's not like we're all that close to her, and she has a thing going with Darnell anyhow), or by just making the scene non-sexual, which would have been the all-around best choice.
I mean, let's be honest, most people playing/backing this game are here for the harem path, and i'm pretty sure the devs know it since the NTR path has virtually nothing going for it after years of development. People were bound to get pissed.