I Have a Shadow

Actually I have two. That I know of. The first one is the one I've had for 37 years. The other is of a more clandestine nature and makes me feel as though I am always being watched. From the glimpses I've gotten of my shadow, I'd say it's a female, brown-haired, around two-and-a-half feet tall, with a fondness for sticky things and cats. Her mission seems to be something along the lines of undoing anything I do. There is at least one major difference between my shadow and the typical secret agent type of shadow: this one seems to "stick to me like glue" in a more literal way. Traditionally, I think shadows are supposed to maintain a discreet distance from the subjects they are following. But I guess this way, my shadow can more closely observe my doings and learn to imitate them for her own covert purposes. Uh-oh. Here she comes!