Oh perfect, kind folks here - youve got a lot of great comments! And then Quadart just said it all.(i also totally agree with him about the horizon-wide angle relationship, but a wide angle might kill your babe, giving her very long legs and a small head) and yes, my PO was off concerning perspective, so its perhaps also a bit my mistake.(i dont agree much with the vanishing point though shown by Quadart, it should be further up, regarding the high position of the camera, also with a wide angle lens)As i see it.
As for the mood: I like some of the proposed BGs, except those which look like a postcard or a kitschy wallpaper. Personally i love e for the colour mood with all that pastel colours, which perfectly underline the skin instead of celebrating harsh blue (but wrong perspective, strong distortion, almost like taken with a fish eye lens, and the impression of being on a house boat).
I could also see some Japanese garden thing as BG, if going for romance. But not too postcard like, and as Quadart mentioned: taken from above (not just head level).
edit: forget the idea with the Japanese garden (didnt think it fully over before) >> you would need traditional Japanese windows then…