1, Start with the basis sketch for the body's skeleton (known as the line of motion). Start with a simple line and shape for head , upper body , lower body , arms and legs. This is a laying sexy pose for a character trying to seduce their mate on a beach or bed.
2, I added the center line for her body. The breasts must be balanced, using the guide line. When drawing a female laying on her side, gravity will act on her breasts, pushing them downwards/sideways. This step can be a little tricky, but with patience, you'll achieve a gorgeous pose! 3, clean up your drawing and proceed onto 4, adding clothes. You don't want a totally naked chick!