This dream may symbolize feelings of loss, fear, and helplessness. The beach with white sand represents a peaceful and serene state of mind, but the absence of other people suggests a feeling of isolation and loneliness. The presence of your grandmother and the two babies may represent your close relationships and the responsibility you feel towards them. The increasing waves and your grandmother’s refusal to come closer may symbolize the challenges and obstacles in your life that you feel unable to protect your loved ones from. The monstrous wave and their sudden disappearance could represent a fear of losing them or a sense of powerlessness in the face of uncontrollable events. This dream may be reflecting your subconscious fears and anxieties about the safety and well-being of your loved ones, and the need to protect and keep them close. It may also suggest a need to confront and overcome these fears in order to find peace and security in your relationships.