why do you need it? the game basically only distinguishes between a positive (0 is positive) and a negative score. positive is romance route, negative is "corruption" route. The score further has no meaning.
It's of course important to choose romance options for "key" choices to actually get juicy content when you are on romance path, and vice versa. But don't worry about looking at some girls butt on the romance path, just because it docks a point.
some tips
1. the better (canon?) content for tegan and chloe is actually on their corruption routes, while felicia on the romance one.
2. in game mode, you cant be on the corruption route of all 3 sisters at the same time, at least not in the first few days