Hi, how are you? It seems to me an excellent idea and an extremely beautiful gift for your wife, in fact I see that the wallpaper is being used more and more, I don’t know if this is to your wife’s taste but you can place, for example, this tropical peel and stick wallpaper https://costacover.com/collections/tropical-wallpaper which is of excellent quality, ideal and perfect for a situation like yours, in fact in that same store they have different designs and all kinds of wallpaper, I recommend you see each one of them and find the one that works best for you