A game cannot cater to the taste of EVERYBODY; some games can just not be for you.Speak for yourself. I'm not against NTR, but other relationships between the main characters look no worse. "but hey, that's what the majority of people playing this game are here for" NOT ONLY
Said that, this one actually makes a good job at choosing what you want to do with your characters, although by the nature of the game the main focus is corruption and how much you're willing to resist (or not) to it.
Alexia can be everything from very pure to extra corrupt and all in between. You can easily set the degree of NTR or whatever it's important for you.
Of course you can see a significantly lower number of sex scenes depending on what you choose to do with her and with Rowan, but that's obvious. Example, if I decide to make a closeted gay Rowan and an unsatisfied Alexia that slowly starts exploring her own promiscuity, you cannot complain that you miss straight sex scenes with Rowan or that she's too whorish. Same if you want to make the two a loving and monogamous(ish) couple against all odds.