Ned, you have beautiful girls, but your photography sucks!
No matter how beautiful or sexy, a girl standing in front of a plain white background is BORING. Add some props, a chair, a sofa, or shoot them outside. Change their positions--sitting down, on their knees, belly or back. Provide some variety.
What you're trying to sell is a fantasy. If you can figure out how to do the tease, to imply that she just might be a little bit naughty, then you'll have something.