She has come around. I can enter my craft room without her fleeing behind the craft bins, I can even pet her now, til she realizes I am then comes the hiss! But they're getting fewer which is good. Tonight, I even got her to purr, which I have never heard her do, even with Mom. Punkin ignores her, Andy tried to get into the covered cat box with her, was that hilarious! He jumped in, you could hear Mitzy hiss, and out he flew! They check eachother out, hissing and growling, then ignore eachother and move on. I think it's going to be fine now, she is a pretty cat and is getting more comfortable with her surroundings. Thanks for all the advice, I appreciate it! I'm glad I didn't give up on her!
3 hours ago