I think there is a problem of either mod or saves corrupted by mod, because all the game is asking at this choice now is this:
All that's needed to take the second option (the own I show in the quote is the to have participated in the gangbang by the office team (which of course necessitate Myriam to not kick Anthony out of the house previously), but from a few screenshot I show showing the choice moment, I can see they all have the old version before this update, which means that there is a mod in action that do not have taken in the new changes.
Reload the game clean, and retry a save (rollback a few lines maybe as well), if you want to push it you can even restart the game to this point, the choice is at the end of chapter 2.
That's normal, this update, beside the 3 bad endings, has brought the game to the end line, meaning this particular choice, where the player can see the endings that will come in the future updates (right now I'm on the paramour Danny one)
Myriam getting kidnapped is normal, it happens at the end of chapter 5, then the previous update was all about her escaping or being rescued, after that I need more detail on the bad ending you're talking about, if it's number 2, finishing up as a sex slave for the Sawyer family, just rollback to when she's waking up in the barn the first time, there is multiple ways to escape if she can't be rescued due to some choices made previously.
Is it that surprising that a game I said is heavily based on choices and their consequences will put importance on some choices and their consequences... There is a lot do in the game and a lot of choices, and now comes a lot of endings, not all of them can be seen depending on the choices made during the game, but players will still be able to see quite a few of them in a single run, that's the point of the final choice at the end of this update, to give the player the possibility to see multiple endings without having to redo the game each time for each ending.
And I must say, being compared to Fallout 1 and 2 is definitely a nice point for me, love those games. ^^