I not really well practiced at drawing voluptuous women. In fact, my strategy to make a character not look male was to make her as lithe as possible, add eye lashes and a couple extra lumps, etc.
So, I'm kind of hacking at this figure tonight. I think I'm heading in the right direction, but there's definitely something to be had. This sketch has several more detailed layers, but I exempted them as they aren't quite developed yet.