"And there wasn’t anything wrong with that, he repeated internally."

Yea, I think this is def all going according to Molly's plan. Aiden constantly repeating to himself that her leaving him alone is due to his warning just sounds like cope. 

And this chapter confirms she knows he has(had) a crush on Carmen so she probably knew a talk like the one that just happened was going to occur. Especially if she figured that Carmen has a crush on her.

For the bad ending, I'm assuming Molly gets what she wants through that crush.

She is one evil bitch bro omg