We have been living my sister-in-laws home since December 1999. We have never paid any rent. We have done up grades which include new roof with soffit and eavestrough/new furnance/new bathroom/new flooring/new windows. We also replaced an old wire fence with new fencing and added decks. We have been paying the property taxes since we moved in. This week we received a notice to evict by July 31 2010. We have NOT had any contact with the sister-in-law as she moved to Sicily in 1980-81. What recourse do we have? Can we claim "squatters rights"?