First of all I think the newest patch is amazing.
I just encountered a bug where if you choose Zen as your step sister and if you try to fuck her (even at 100 relationship point) it would show a text saying something went wrong. Please report to the developer.
In addition, If I get the Emma Mackey event and my wife (Emma Watson with the ignore choice which I increase happiness to allow me to cheat) still get angry at me when I cheat on her with Emma Mackey in the event