Ember fails to hide her arousal when you accept. “Okay, then follow me.” The two of you move into a secluded spot. Once she is certain nobody is around to spy, Ember turns to face you of its hiding place. “Okay... but you’re only allowed to watch! If you do anything weird, I swear I’ll smack you!”
You promise her that you won’t do anything.
Ember sits down atop a rock nearby and spreads her legs, giving you a perfect view of her moist slit, dripping with excitement at the act she’s about to perform. Her hands start massaging, slowly tracing the outer labia, evoking soft moans from her with each caress. With one hand, she slowly spreads her netherlips apart; moisture leaks copiously, giving her pussy and fingers alike a shiny, slick look.
Once she’s fully exposed, you gaze inside her pink vulva as it blooms like a flower; a flower that contracts with each moan of pleasure emanating from Ember, as if inviting you to caress it.
Your earlier promise to behave yourself gets increasingly harder to keep as Ember’s show turns you on more and more; the bulge inside your semi-transparent bodysuit more than indicates your desire to break your promise.