Donna,
I can tell you from first hand experience- it is incredibly difficult to move to another area (even if it is one you are originally from). It takes such time to find a new support system, set of friends, habits, memories, etc.

I moved from Cinti, Oh to Seattle, Wa, in 1989 (I was 23). Then, two years later, I moved from Seattle to Worcester, Ma. Five years later, I moved from Worc to Cinti. EACH time, it took me a minimum of 9 months to feel even close to 'at home'. AND, I had a job packed full of young people like myself each time. IT IS HARD. So, be easy on yourself- and that might mean distancing yourself from bad energy. Last I checked, we only get to do this one time- make it as good as you can FOR YOU.

And, with the little bit you shared about your SIL, well, it isn't any wonder she has some meanies in her...she DOES have a rough boat to row, and probably isn't feeling very good about things. I don't excuse her behaviour, but it does explain her frame of reference.

Hang in there....it only gets better with more cats.
Johanna