The umbrella in the dream, in most cases, expresses the desire to be protected. Or subconsciously want to hide something (only you know). In the dream, you gave her a pholiota adiposa and a green umbrella to show that you want to be with her or to be protected. Maybe it's your wish to protect and care for her.
This light rain is a sign of luck. For the color of the umbrella, green represents being able to travel; Yellow-the color that is easy to dream when you are not satisfied, or after quarreling with others.