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I don't know what dev thinks but that probably won't be the case. Mom, sis and her friend are probably never going to be part of the club. Other than them, everyone who has relationship points are part of the prostitution club one way or another. About aunt ... it's not like mc can be with her whenever she works...so she will have to choose some random person every single time...
dang, based on that, it's prolly not finished, and we'd have a task, to be always at her work, like we can prevent her from doing other dudes, like if we dont, she'll fell to that job and become full time prostitute, though i hope if that's the case for the game, i hope all of the stuff we have to do is manageable, and don't get a conflict between choices, like if u go to her work, mc's mom will be at risk, or if u dont go to Sarah's work, Sarah will have to ride other dudes, which might be a thing to these games, damn i hope everyone is saveable.