I agree! While Holly certainly likes Lena, Ivy, the other partners and had fun connecting with her inner slut, she is also a smart girl. Being more like Lena and Ivy opened her the door, but she also knows what Ian cannot stand, things like cheating.
This is one reason for theory A, I think Holly will mostly shut the door to her slutty side, keeping it reserved for Ian.
Since we also have a path with shy Holly being gently encouraged by Ian, Lena and the others to open up a bit, my theory B for slutty Holly came to be. With Holly and Ian experimenting some more with her wild side, but just a bit like e.g. her being open to go topless, some exhibitionism and erotic photos. They stay dedicated to each other too.
Theory C is for larger and wider experiments with Holly´s slutty side, e.g. threesomes, girl-girl and so on. But still above the table, no cheating and behind the back stuff.
The theory D, which
ffive or
Gicoo brought into play, is more a bad ending of C due to less than optimal choices done there.