You're nearing the end of a time when you were asked to fill in for somebody else. At first, you didn't think you were up to the challenge, but not only did you rise to the occasion; you positively flourished! It will be hard passing back the reins, but you must. This was something that was on loan to you, and like with any loan, you must give it back. One good thing to come out of this is a boost in your self-confidence. Another good thing is the positive impression you made on a higher-up who clearly has plans for you in the future.