When Darnell got beaten up the choice you make didn't change your relationship. If you help him your relation could soften and this NTR wouldn't happen cause he respect you now. And if you not help him this NTR would happen because nothing change between you. That choice would be perfect to put more Darnell in the mc life in my opinion. And that would lead in climax with the sister story cause Darnell is his boyfriend and that would lead to 2 differents ending for that story.
For starters, the way I understand it, Tiffany is being used by Darnell somehow... At least that's how they make it seem up until THIS update where suddenly she's telling us we're wrong about him and really deep down he's different? Even though like a day later he instantly plots to bang not only our mother but Tiffany's as well. So that's already one contradiction caused by this whole [let's just shove Darnell in to cuck you because we want to] thing.
The next of course being the whole stupid decision making by Mary I've already gone into detail about in earlier posts. The hospital scene is odd because instead of addressing that between the MC and Darnell it's just...forgotten? So regardless of our choice that night the next time we see him he's trying to steal our MILF.
Also I hate to be that guy but the drunk dialogue was pretty cringy. I get that it's his first time being drunk but I was around the MC's age when I first got that drunk and wasn't anywhere near whatever they were going for here.
Ideally from the start it would've been that Red was an impulse driven, narcissistic sex addict who would step over anyone to get what he wants from the world, what he believes it owes him. This would then impact the MC, having realised that despite the split in personality it's still his own body committing these acts. He's just as complicit in them because he stands asides and watches. This would cause the MC to shift a little in behaviour. A watered down Red that has the confidence to get a little handsy with the girls they've already conquered and then when the time comes to this update where Darnell is close to cucking you he'd rush in and deck him.
But whatever I guess.