Continue working her nipples

You love the feel of her soft breast under your hand, so you begin to touch her other breast as well. Slowly exploring and teasing- running your fingertips along her ribs, caressing the lower curve of her breast, then squeezing and kneading more firmly, then sliding up and feeling the warmth on the back of her neck under her hair.

She seems rapturous, eyes shut, head tilted back, and every time you return to her breasts, her mouth opens a little further, her breath gets a little shallower. You squeeze her nipples again, working them between your fingers, and this time she moans softly, startling herself.

Hearing her moan, you turn up the heat, squeezing her nipples a little harder, being just a tiny bit rougher with her breasts, still gentle, but with some ferocity. Every time you squeeze her nipples, she moans more, so you keep going, a little faster, flicking them, squeezing them, playing with them.

She's totally flush now, blushing in the face and her upper chest. Her eyes are fluttering and almost every exhale comes out as a moan.