The short walkthrough is included with the game and can be accessed through the menu screen, the same where you save and load up saves. So by hitting escape or backclick you can reference the Peter NTR section of the walkthrough whenever a decision comes up if you are not sure which one to select. When you find the right decision on that sheet, you can hit resume to go back to your playthrough in progress. The most important part is the point where Nat decides to stay home instead of going to the gym with Darrel or going to the interview with Ethan, just staying at home and getting drunk instead.
First of all, thank you for responding, as I said, I have already tried several paths, including the one you propose and I also looked at the guide, and I still find myself only with the option of accepting Jenna's offer or Darrel's, I have come to think that maybe it was removed because before it wasn't so difficult for me to find that option. As for me, I will wait for future updates where the route of Petter's character is explored more and I take this opportunity to express my wish that instead of expanding the routes in number, the existing ones should be polished and since plots are completed then, we continue with new adventures...