Well I really hope so. I guess I will have to avoid interacting with the other cat and try keeping him out of our yard and away from her window. I will see if this helps to relax her.
Also, winter is coming soon along with about 10 feet of snow so that should put an end to the other cat's roaming.

Hopefully she will settle down. This is not boding well for my dream of adopting a second cat. She would probably tear it to shreds!!!!

Thank you for your help.