Often when we talk about emotions such as fear or shame (or lust, even) we talk about feeling them in our stomach somehow, as though they were a tangible thing moving inside us. Perhaps you know the feeling, when it feels like there's something heavy and uncomfortable inside you? When your emotion is so serious that you could swear to it being a physical thing? Almost a living thing, something you had no control over?
She is describing her feeling of shame as if it were a creature living inside her, moving and making her aware of its presence.
Sorry, I'm not sure that was a very good explanation.
Student or Learner