warning for those who want to play this garbage is full of unavoidable NTR and the dev simply does not put the label all the girls are having sex with other boys or kissing them like the mother and the guy except the mc
On the one hand there is Scarlett (MC's aunt), who is clearly a slut who dedicates herself to fucking lots of guys (and of whom nothing indicates that she has stopped doing so while she is with the MC). Her only options are: That her husband is present (and I assume that he participates in it at some point) or that he is not present. If you don't want to know anything about her, the only way is not to follow her route.
There is also Evelyn, Scarlett's daughter and the MC's cousin, you discover that she used to have threesomes with her mother and with random guys. Apparently the "ask for help with yoga" system was the method used with them and with the MC. When the MC discovers that she is a slut like her mother, Evelyn seems worried that with that revelation the MC will leave her (according to her, the MC is different, he is not like the others, or some such nonsense), unfounded fear because the game doesn't even even give the option, the MC directly forgives her and decides that he should continue with her. In theory Evelyn doesn't keep fucking other guys. This is another one that to avoid you have to not follow her route.
I'm of the opinion that an option to reject Scarlett and Evelyn's advances would be perfect.
Bella, the name of the quest that includes her makes it quite clear where it is going, but I had to try if there was the option of making her break up with Derek (who is her brother) and to stay exclusively with the MC. Of course not. If you don't want Derek to participate in the scenes between the MC and Bella, she keeps fucking him anyway, you don't see it, but the game make it clear that it's still happening. The other two options are, let Derek participate too, or send them both to hell and never hear from Bella or Derek. The last one is the only one I find viable.
Kathy has an incredibly suspicious job as a "waitress" at a gentlemen's club where high-end whores clearly work. One of her jobs is to "entertain customers." Although she claims that she doesn't have sex with them. The MC believes it, but I guess everyone can think what they want. In any case, in principle nothing seems to indicate that she is lying.
I'm not going to comment on Mary's route because I haven't started it. But from other comments I know that apparently there is a point where you can let a guy rape her or not.
I haven't seen anything about the mother (Alexia), the little sister (Tahlia) and the other aunt (Clara) that I find worrying. At least for now, but who knows as the game continues.
Gabriella is lesbian (or bisexual, I'm not sure) and wants to have a relationship with the MC and his little sister (Tahlia). You can say yes or no. In this case there are no other guys involved, but there will surely be lesbian sex at some point.