As you point out, it's a question of whether or not the game ever reaches that point in development, but what Alishia actually told us was that all possible NTR points will be obtained within the intro and first several in-game days of the story, though she didn't specify exactly how many in-game days. It might be the first week, or the first week plus a few days. After that, she states that the player's NTR score will be locked, and the player will be on either the full NTR path or the light NTR path.