So if you get the amulet you can fuck your mom and the guy doesn't have sex with her, but the dialogue with the goddess still mentions it. If you don't have the amulet he has sex with your mom.
This is the entire update.
I don't know if the dialogue was wrong or if you can stop your mom from having sex with anyone else.
Personally I would like to know what the actual game play loop of this game is going to be. Am I going to be doing puzzles, am I doing rpg combat, will I have to do tedious fetch quests? I don't know the answers to any of these questions so I personally still care very little about this game until I have these answers and I experience it myself.