Try not to have any light reflecting off in the images 3.
Begin by lightly caressing her arms, the back of her head and hair, and then, as things progress, stroke her breasts under her shirt or wait for her to touch you.
For example, you can increase contrast for midtones only by tinkering with the middle part of the graph line.
Your girl needs to feel like you know when she's sad, nervous, anxious, or even just cold or hungry.