The "new" bedroom, sort of

We agreed upon making one of the bedroom windows smaller, ie the one on the right side and that made it necessary to change the wallpaper I used as the top one since I didn't have enough (read nothing at all...) to fill in that spot but Mz Chantilly is still happy and that is the msot important...

Right now we are a bit puzzled about how to proceed with the interior window casings in this room though, not the one to the right but the double window...