Ah, Fy, you know I love you, and I see what you are saying, but, um, no freakin way should she apologize.
Who cares if she thinks Rosa is angry, crazy or anything else? Doesnt matter what the heck she thinks because SHE doesnt matter one bit.
The OW will be laughing at her if she apologized, trust me on that. And she is already wondering what the heck is going on - let her.
Here's how you close the can of worms right. You let this play out. You let Rosa's h tell the ow that Rosa is walking around like she is in charge and acting like that whole thing was just an annoyance.
She shouldnt give any more credence to that whole ridiculous affair.
The ow is nothing. She is not worthy of another word.