I recently tried the dark path to see how different things are. I have a couple critiques/suggestions. To avoid triggers I would recommend renaming the NTR warnings.
The path stating "Actual NTR" is a cuckold situation however the other "NTR" paths are not and include prostitution, rape and/or gangbang. These could be triggers for some people that would have no warning based on your current tags.
I think there are many people who would love a hero intervention in certain dark paths. This is just a suggestion.
I also believe the Gary intro to act 3 is more believable than the other one.
Overall it is a well developed game and character development is amazing. I'm looking forward to the future.