He glanced over his shoulder, and fell into absolute awe at the sight of his newly transformed wings. The top pair of wings were still massive, although not as massive as before, with black feathers that were edged with a flicker of gold lining at the edges. This detail hadn't been there before.
The new lower pair glimmered faintly with crimson light that seemed to seep through his skin. They folded over his back with grace. They lacked the gold lining at the edges that the top pair had though.
It was done, he thought. The bond was now complete. This was the final shape that his wings were going to take. He had never heard of a demons wings changing shape after they were fully mated. The normal thing to happen would be the stabilizing of ones power.
However, was this because his mate was an angel?