This is so stunning! I love it!
Overall, it's really well done, the sky in the background is amazing, as is the flower itself, and even the vines there in the foreground. But as for Ame herself, I feel there is too much difference between Ame's Ame and this depiction of her. I understand there is a difference in art style, but in this depiction Ame's hair is almost to the point of black. Secondly, there is a garter on her leg, I'm not sure how it could be there considering Ame's lack of lower legs as of yet. I would mention the lack of pubes being an issue on accuracy too, but I know that Ame pretty much just gave you a reference without much explanation, so with that in mind the overall pic is amazing in and of itself, it just doesn't really look like Ame in my opinion due to such a contrast in colors.
Yeeeah I forgot to mention pubes in the description since my version was off to the side; didn't think about it. XD
Ohh Velsen this is beautiful!! She's going to love it!