Wishes coming your way for your sister-in-law! My daughter calls her cat "neurotic" too, but when I keep her, I find her to be very sweet and affectionate. Maybe that kitty will react different in different surroundings and you can help them be less neurotic.. I define my daughter as a "live wire" and that is what her cat reacts to, but over here, I am quiet and laid back so her cat is too.. her kitty might change under your roof.