While I personally would also appreciate some swinging/sharing content, I don't see any tag suggesting such content so I wonder where you got that idea (there isn't any ntr tag either, just cheating).
I didn't even get the cheating content because I don't like much treating the partner like shit and then being betrayed. Too confrontational. Though, since I focused only on the young girls (which are more attractive in this game imho), I expected the wife to actually cheat on me, she's very tolerant despite her look.
Apart from that, very nice game so far. I don't really get why the average review rating, the girls are damn hot (I especially liked the spoiled/slutty daughter). Looking forward to the continuation.