Agree. Sharing/Swinging/Cuckolding should be used as I am way over all this NTR futility.
I fail to understand all the emotion that peeps invest in a bunch of pixels being manipulated. I also don't understand why there isn't more tolerance in regard to people's choices. I almost never play any of these games in first person. I like to tinker. I like to see how the dev has written tension, transition, controversy. I don't need an ego boost. I don't need to have a harem with every girl in the game. I don't feel one bit less of a man if I see cartoon characters on a computer screen boinkin' another cartoon character. Maybe it's because I'm 50+, have had my fair share of women, although only one in the past 25 years, and want to explore these games with an open mind. Every game, no tension, get all the girls, never threatened...I'm the king of the world!....heh...what a bore.
That said, in regard to the dream, I like the tension it creates. We all face such things and how we deal with obstacles makes or breaks us. I like it in these games, too. I can play one route and go back and play another. It's all good.
Should the dev have labeled it or given warning? There is no right answer. What each player brings to the game is what decides the answer for them, no one else. If you don't like it, <delete> with grace and play another one of the hundreds of games on here.