Seperate property or not?

[mica]

11 years before I married my wife, I received my mothers home in the inheritance of her estate. In turn, I cashed out that home and purchased my current home. There was no mortgage and my brother and I are the legal deed holders. The only thing that my wife contributed to is the general up keep and maintenance of the home. She has told me over and over that she would never consider taking my home, but now that she filed for divorce, she is trying to take it. Can she even consider that? We have only been married for 22 months. I am in Pierce Co. WA