First : The crotch tattoo doesn't render well with the pregnancy vision of Mother event, image attached to show, it doesn't stay centered but is displaced on the left side of the belly. Minor problem but worth reporting for improvement.
Regarding the future fetish mechanics, following Pink Kira explanation doesn't that mean that Kira in order to be herself must stay non sexually active (at least for the duration of the game). I know you explained that charisma would later be use as a kind of currency to remove fetish and would gaind those as quest reward. However those fetish would still be a "menace", Kira can regain them, as I understood.
Given Kira is basically a new person, do you plan a way for her to "secure" fetish as she grow as a person? I mean a way she'll be able to indulge in some sex act without having her though replaced by a pink Kira and be able to refuse when she desire. The short example of fetish mechanics shown with the pregnancy one, clearly show her eyes becoming pink and though replaced by a pink Kira. Basically will the future include a way for Kira to grow, not stay a blank character but not be replaced by another?
Didn't thought such question would come when I decided to try the Mother events.