Preparing my gf for public attention

So I'm with this girl now and even if she's 21 she's still in high school.

Some weeks ago we were drunk and she confessed me she's been teasing the sports replacement teacher with a classmate. Leggings and crop tops constantly. They were competing for his attention. The thrill she got from it was apparently overwhelming.

She was feeling guilty while telling me this, then she noticed I was hard. I acted discrete on that, but then started provoking her. Making remarks on her outfits. Stimulating her in public but in a discrete way. Repeating her from time to time that she's a bit of an exhibitionist.

By now I've been having her dressed constantly in miniskirts and heels (she was more like a skater-style before). She showed me a pic of her in a skin-tight dress and talked me about extra-high heels that she recently got. I'm trying to find the situation to make her feel ok to wear the outfit in public. I'd really enjoy to bring her to public attention and see where the situation leads with strangers.

Comments/recommendations/DMs are welcome!