My first thought, when I saw it, was, "That is ANGEL WINGS!"
Of course I could be wrong - but that was my first thought.
Thank you so much for the cup, saucer, “Glad you are feeling better” on the cup,the pretty flower on left side of cup, but don’t have a clue what’s on the right??? Seems like some sort of feathers? Well, anyway it’s very nice and I thank you!!!