Cats are particular about spaces. Most cats share spaces but dominance (or the cat-equivalent) can sometimes be assessed by who gets the best space the most.
My cats don't share...anything. They even have their own kitty litter boxes. They are forced to share food but only because when I tried to create a his and hers, he ate both.
In the new house the kitchen window is the favorite spot. It is best when there is sun but loved regardless of the weather.
Smudge must like this house a lot because she has not been backing down, especially when it comes to the window seat.
Consequently space is now shared.