Thanks all... still learning how to get the best from the D-Lites, only had them a few days...
DD - the shot was taken in our living room, which isn't anywhere near as large as your studio space and so Jen was unfortunately, quite close to the background. I was aware of this, and tried to angle the smaller softbox inwards a little more, but obviously there wasn't enough room to avoid the spillage of light onto her shoulders. I then tried to balance the image edge softness a little by burning out the opposite side too.
See... I do try...