You can do it with what you have, try Rembrant lighting, move your wife farther away set light at 45 degress to her at head hight the other side of her face will be in shadow if there is too much shadow use a reflector to bounce a bit onto the dark side and the other light can be a hair light opposite your other light 1 stop lower or a background light Background looking busy means that there are many distracting shapes and colours in it.
There are places where it's hard to differentiate between her and the background.
It can give them a nice 'halo' effect where it lights up their hair.
To the point where it takes focus away from your subject as the eye can be drawn to these various shapes in the background.
This is a light behind the subject that is pointed back at them.
Its a black and white background, with odd smoke effects going on, she is wearing black and white.
But I don't recommend using either one, not if you want to 1 stay married or 2 avoid sounding condescending or overly jokey.