I've actually shared about a technique called "Freshen Up your Flowers" in one of my older post. This technique is a step ahead of that. Instead of just creating droplets of water on and around the flower, you can also create small puddles of water in your flower.
My inspiration for this technique actually came to me when I try to water some of my plants and it seems that when I try to wet the flowers, some of the water would get caught up in it.
Therefore, I've tried to create the same here. Simply used some glossy accents and spread it in the center of the flower and on some of it's petals. I really love the effect of this. Try it!