As I exited the movie theater with Danica, I thought it would be fun to hang around the mall a bit longer, her being without any underwear. She was kind of nervous, but didn't object.
As we walked around looking at all the stuff on sale (there seems to always be a bunch of sales in that mall), I kept running my hand all over her dress, making her acutely aware she had nothing underneath. Of course, I took care not to obviously grope her when there were people watching us, but she still felt very exposed, and that excited her.
I soon took it a step further, and as she was watching a store display, i ran my hand under her dress and groped her bare ass. She gasped, and quickly moved away in surprise, but I saw her smile after a few seconds of shock, and her eyes flashed.
Seeing that my experiment was a success, I really turned up my teasing of her, sneaking my hand under her dress whenever we could get away without being seen, groping her ass, her boobs, lightly pinching her nipples, or just running my hand over her back under her dress.
I could feel her body heat gradually rise over time as I did all this, and after a while she also started trembling. As I reached under the front of her dress and touched her pussy, I could feel that she was soaking wet, it was almost running down her thighs. She whispered to me that she needed some relief soon, or she would explode.