Go through the game while also selecting the "it would be hot to see Liz be oggled by men" choices that pop up every once in a while.
Note that being on the ntrs path will only tell you you're on the ntr path, don't worry. When Liz starts asking you if you REALLY want men to see her dress in very little clothes ALWAYS select the options that are yes coded.
Eventually you'll realize that she's going through the ntrs path. Good luck.
