Dreams involving childhood homes often symbolize a return to one’s roots or a reflection on past experiences and emotions. In your dream, being in your twelve-year-old body suggests a desire to reconnect with your youthful self or unresolved issues from that time in your life. The sunburn and bruises may represent feelings of vulnerability or past emotional wounds that are still affecting you.

Hearing your mother call you for lunch and the laughter of your siblings indicates a longing for familial connections and the simplicity of childhood. However, the empty house signifies feelings of isolation or a disconnect from these relationships in your present life.

The blank book you were "reading" could symbolize a search for meaning or a desire to write your own story, while the sand on the floor may represent the messiness of life and memories—suggesting that past experiences are still present in your current reality.

The scene where you peek through the keyhole and see your husband with your present self can indicate feelings of envy or insecurity regarding your current self-image and the relationship you have with your husband. The shame you felt for peeking may point to internal conflicts about your desires and boundaries.

Your mother’s reaction when you turned off the record player reflects a fear of judgment or disapproval, particularly from authority figures in your life. The tears that filled the room and your swimming through them could signify a release of pent-up emotions and a need to navigate through past traumas or feelings of inadequacy.

Finally, ending up on the shore with kids and rabbits suggests a desire for innocence, playfulness, and a sense of peace. It may symbolize a wish to return to a more carefree state of being or to find joy despite the complexities of adulthood.

Overall, this dream seems to reflect a journey through your past, dealing with unresolved emotions, and a search for identity and acceptance in your present life. It may be beneficial to explore these feelings further, perhaps through journaling or talking to someone who can help you process these emotions.