Badrei is a dragon who has courted a human - but who could possibly tell how that sort of relationship could or should end up? He loves her dearly, that much is clear, but they can't come together in sexual fervour, their bodies just not matching up.
But Annie wants to try: oh, she does. She loves him so much, yearning for him, doing what they can with the limitations of their bodies, a wyvern and a woman caught up in spell binding lust. She yearns for it more than anything else, enough to try when she doesn't think there's any possible way that she could take him, not with such a big size difference between them.
Badrei, however, has more than one trick up his dragon-sleeves, curling his magic around her, lifting her up, taking her into his fold. Yet the transformation is to be controlled by her and her alone.
If Annie trusts him, she might just come into a whole new form, finding a body that will suit his size...