Uuuuu....friend, you have to get almost to the "end of the game." A sign will appear when you go to Nestor's house warning you that you are reaching the end of the game. If you are missing any missions, go and complete them or else you will not be able to return. Depending on your decisions, you will have a good ending and a bad ending. The bad ending is when Nestor and Maria are killed... You can see the second image when you unpack the game's rpa file in the game folder. All the endings are there... A few pages back, I made a short tutorial on how to see all the scenes and variations of the game... I hope it helps...
Greetings
pd: I attach the page
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