Shame in a dream often centers on exposure -- a sense that something about you, if seen clearly, would make you unworthy in someone else's eyes. It tends to surface around a specific self-judgment rather than a general feeling, so the dream is usually worth tracing back to exactly what you fear being seen doing.
The Moon hath a certain natural mutability, therefore she easily communicates to us the Influence of the other Stars. - William Lilly (1602.-1681.)