What's the furniture like? Do you have the bedding already? If not, buy the bedding first. Then look at wallpaper. You can get something really nice for the wall at the head of the bed. What colour does she like? She'll want input, I'm sure.

If you can't clean up the painted edge, you could always add a 1x3 piece of wood as molding. You can even carry it up to the ceiling to frame that wallpaper. I don't see that paint color in the wallpaper, or maybe it's a lighter version of the flower centers. Maybe stencil on a design using the darker color, or another color from the wallpaper to help tie it together. Then narrow floating shelves or vertical frames or something in the painted areas it you feel you need it. Maybe turn the bed around so the wallpaper is the headboard.

If you want to highlight the staircase wall then your could use earthy colours such as a yellow ochre! The wall could be enhanced even more by using suitable frames and making a good collage composition for all the photos that you have (I can see many lying on the dining table). This colour would match well with wooden furnitures

Thanks all, for the suggestion. Yes will stick to white for all other sides of the room. one is full glass with curtains, the other is behind the sofa, a plain wall as of now with no art or anything, this is just opposite to the brick wall. The 4th side is the foyer and a small wall with a artsy clock. The living area is more an open plan, that leads to dining on one side. I am looking for wall art ideas too. I create my own art for the home, I have not gone commercial, just do some art for friends too when they ask as gifts :-). We are changing all the furniture in this room, including the softa. have ordered recliners in light brown color, A square center table with stools underneath, and a side small curio/book shelf. Thanks once again.