A passage!

"Aha!" Meghan exclaimed. "This must be it. I don't see any other way out of this room, but there is a passage under the jaw of this skull, just above the crossbones." Yvette examined the small hole Meghan was pointing at. "That looks rather tight... You know i hate small spaces. i might not even fit through there." Meghan examined the size and shape of the hole and then the voluptuous curves of her older sister. Her nakedness revealing the full size of her boobs and butt. "It should be fine, besides we shouldn't back out now! and you can go first so i can give your big butt a push if you get stuck." Meghan offered and winked at her sister. Yvette begrudgingly agreed.

After steeling herself and trying to calm her nerves Yvette leaned forward into the small hole, arms first and then pushed her head and shoulders in after them. It sure was tight, but it just about fit and she pulled herself inside. Crawling forward a little bit, Meghan then climbed in after her, her slender and limber figure easily allowing her to follow her older sister into the darkness. Because of the tight space, Yvette could not cast her light spell. So the two of them had to climb throught the tunnel, which seemed to have a slight decline, in total darkness.

After about 15 minutes of crawling through the hole, Yvette piped up: "Uhh Meghan, i think we have a little bit of a problem..."