This game is definitely a little gem and like UncleVT I also recently discovered it. To be honest I was kinda disappointed to read that there will be no option for Nikki to be an end girl in herself, she is worth it in my eyes. Would there be some option though to have her be part of a long term love triangle in the game? Somehow I got the feeling playing the game that it would not be impossible to develop the relation with Molly in a way where there could be real love between all three of them. This is of course one of the few situations where an incestuous relation can work in real life, since easier to show an acceptable face to the outside world.
Considering Nikki's sexual liberalness, it is a key part of the story and kind of refreshing. She is a great girl, caring, supporting, funny and not bad on the eye. Would be great girlfriend material except for the fact she does not seem to understand that if you want to be in a long term relationship with someone you first have to get to know the guy/gill a little, the guy/girl likes you and not just your body and make sure you are on the same page when it comes to some important things. Just manipulating people and having quick sex with them, might make for a great sex life, but scare away the kind of man/woman she wants.
Let us hope her brother can teach her some of those things by example during the game, so she grows a bit as well for
when she is ready to look for a serious relation herself. The joke is in a way that the way she acts in relation with her twin showing all her facets off, is exactly the right way to get into a steady relationship, which smart man/woman can really resist a girl like that.