I checked your save file and everything is fine about your save file.
These photos were taken by continuation of your save file:
it is better:
Click on my signature first.
You can get the latest bug fix in the post you are referring to. Install it on your game.
then:
Use the save file you sent. In the next morning before Ann goes to work. Save your game at 10:00. Now you can check all the minutes by using this save file.
Now go to her room in the remaining minutes before she's going to work (important: use the "open door" option, not the "knock on" option)
This is a random occurrence. repeat this until you be successful.
but the question is why there is no scene(sex) except with Aunt Max?
Because this has not been designed in the game process so far. This process is gradual