"Alright girl, I'm gonna need you to open your mouth" - Astrid says to her dragon friend, standing up and petting Stormfly's muzzle with both arms.
Stormfly cocks her head slightly, looking at her tiny human with her right eye. Why would she need that, she thinks, but seeing her tiny form shivering, most likely, from cold, she agrees.
The dragoness opens her mouth just a bit, and extends her tongue out, placing it on the cold stone floor in front of Astrid.
Astrid feels a bit intimidated as the jaws of her dragon part in front of her, revealing a huge dark pink cavern, with strands of saliva stretched between the jaws, and a warm breath coming out of it, washing over her. Then, the huge tongue rolls out of it, and the girl feels the warm wet organ touch her feet, staggering from it a bit.
Astrid looks in Stormfly's mouth, examining it, and feels unsure about going in there, as she looks at the throat at the far end of it.
Maybe riding in her dragon's vagina would have been safer, she thinks. At least she wouldn't risk getting swallowed alive there.
She remembers about the rags that Stormfly torn her closes into, by her request, but decides that wearing cloth in a wet place would only make her colder and more uncomfortable, and she should remain naked.
So, looking at the huge cavern in front of her again, Astrid finally makes a decision...