Turned out I became pretty disappointed with this. I was doing the swim trip and decided on the sharing route. I don't think devs understand that type of route. Anyway, in the scene with Danny and Calvin it changes from sharing to something else.
First, I hate that with a female MC the males always have to be insulting and degrading as Calvin was to Lisa. Even if the woman wants to be dominated doesn't mean you're verbally abused. Now, I understand using certain language as a turn on, but attitude behind it is important. The person invited to share doesn't get to act like an ass, you are deferential to the one sharing.
Second, Calvin becomes the dominate male and makes Lisa his slut and she agrees? That's not a sharing route, that's something entirely different. In a sharing route the two people agree to participate in sex with others, but their commitment is to each other. You don't become some one else's slut. That would be more a master/slave route, but Danny would still be the person in charge. Instead he passes out and now it's a cheating route.