It could also be that the mother values the creativity and imagination in the stories. By showing her approval, she is promoting the development of the storyteller's creativity, which can be beneficial in many aspects of life such as writing, problem - solving, and social interactions.
Perhaps the adventures are full of interesting events, like traveling to new places, meeting different people, or facing challenges. When the mother likes these stories, it encourages the storyteller to keep sharing and might also strengthen their bond as they communicate about these experiences.
If we consider the corrected version 'Mom likes my big adventure stories', it could mean that the person's mother enjoys listening to the exciting tales of the person's adventures. It shows a positive family relationship where the mother is interested in the child's experiences.