I can't say it any better than the comments above. I had thought and still believe that Elisabetta may have had a few redeeming qualities somewhere deep inside her. In the end no matter how she viewed herself, she made the choice to remove the Cosmo's decision to jump. I believe that along with Luca's plea she saw he had a chance. It is a shame and everyone's loss that she could not see it for herself.
I'm not sure I can say this correctly and apologize in advance, there are only so many times you can abuse, torture, and denigrate anything or anybody before they turn feral. I've witnessed what happens when a pet or a person is pushed over the edge, when all that is left of existence is fear and pain.
I had to choose angry as my reaction, I'm angry that others are responsible for who/what Betta became. While I know life is never fair or easy, the loss of anyone diminishes us all.
As with others, I think this is your finest chapter, a brilliant example of your craft and wordsmithing.