Being caught in the act is read as guilt or fear of exposure. Dream books also take it as relief at finally having something hidden come out into the open.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.