I have the button locked, I can only go to the party with Valeria. How is it unlocked, how many points do I need.
Actually in my playthrough, the Aly-Val-MC-Aly´s Dad scene is definitely not triggered by going to the party with Alyssa. I got it with both going to the party with Aly or Val. It is more important to be closer to Aly and to bring her home at least once.
I found out that there is alot of stuff in this update which is triggered in sequence and you can miss many scenes if you did not "work for them" earlier.
It is ironic that I could trigger most events mentioned in the thread, but for some reason I am unable to trigger MC-Val having sex with the lights on and his father in the pool.
But this update is definitely worth it! A lot of stuff, if sometimes very hidden (you need some exact prerequisites to fire them), good work!