Gretchen! You have mentioned several times that you don't understand how Vicki can be so critical and judgemental, etc. I think its her own insecurities, her value and her identity lie in what she can accomplish, and how much money, nice things, etc. she has. Maybe she has never had anyone in her life affirm her for who she is, and not what she does or has. She has be perfect to feel like she has any worth, so of course she has to be right all the time. This is the standard she is trying to live up to every day, it is only natural that she applies this standard to everyone else. It's like a big anchor around her neck, and the stress is killing her.
She is a bully, but it's because she has a lot of wounds in her life that she has hung onto and nursed. Hurt people hurt people. So if you can try to understand the Why of someone's behaviour, you will understand the How. So when you look at Vicki, instead of seeing a mean bully, you will see someone who has a lot of hurts and never learned how to deal with them in a healthy way. Set up your boundaries about how you expect to be treated, and then calmly but firmly hold your ground. Onward and upward!