Thanks to how jiggly the Indian girl's butt was, it was easy for you to push beneath her bikini bottom, and begin squirming deeper between her ass cheeks. The only light you had now was filtered through the green fabric above, growing dimmer and dimmer with every centimeter deeper you crawled. If the outside of her butt cheeks was delightfully soft, then the canyon you were currently in had a softness that could only be considered heavenly. The smell... the smell wasn't too bad, either, though you had the feeling the close proximity to the ocean had something to do with it. Still, you'd take what you can get.
Each press of your hands and feet into the butt cheek walls made them wobble and bounce delightfully, accelerating your descent all the more. You weren't sure if you could hear the girl from this deep in, but maybe she'd remain a heavy sleeper. You hope.
Eventually, your descent came to a stop, as you brushed up against what must be this woman's pucker. Perhaps you would dare to squirm through it and explore this thicc girl from the inside...?