There is guilt there. And I am all for guilt just not that which is directly applied by the LBS.
She has to process her own guilt. She has to come to her own conclusions.
You can't fix her. You can screw things up more by your behavior, words and actions. Which is why the advice is to just validate right now. And detach from her drama.
If she wants to talk this weekend my advice?
Just listen. Don't react.
One of her perceptions right now is you hate her right?
What can you do (not words) actions to turn that around?
My goal is to some day be the person my dog thinks I am