Yeah sharing/swinging content is avoidable.
But that it is a first release and you already have that option with 3 characters (student, daughter, wife's mother) doesn't) give me high hopes to be honest.
With 2 characters or so in total ok, i also get it with the wife's mother understandable, but if the most LI's and even the daughters get it...
Not really a kink most harem or incest fans look for, not to mention the large amount of work which will go into this if most characters get it as option...and i'm not sure in which direction the dev want's to go with the brave/coward points.
How well it will be recieved depends how the dev implements it imo.
If it is the MC which can guide/make the LI's open for the idea of sharing ok, but if for example the wife or daughters are are open for that and we need to prevent that with choices...not such a good idea.
Beside that, i really hope lesbian will be avoidable, never rejected two characters so fast as the wife's aunt and mother...the aunt going about how she planned to take the wife's virginity and ravish her...yeah no pass.
Not that i like the wife's father any better, which wanted to fuck her...really i want to have nothing to do with that family, that the wife's there for months...well we will see.
Overall i find sharing/swinging to be...a bit of a weird choice here.
As the whole premisse is, that we have a MC with a third leg, a medical condition that he needs to get relieve some 20 times a day, that nearly fucked his gf to death in a sex marathon and where even his nympho wife cant keep up and brings other women in to 'help' the MC (well besides she likes to watch as he breaks the girls and make them his cumsluts).