This dream may symbolize a deep-seated fear of losing your family or being separated from them. The car crash represents a sudden and traumatic event that shakes the foundation of your family unit. Your parents’ decision to send you and your sister to separate families for six months may reflect their need to distance themselves from the trauma and heal. The new family you are placed with may represent a sense of stability and support during this difficult time. The presence of a hot older brother may symbolize your desire for a strong and protective male figure in your life. The underwater house may represent the depths of your subconscious mind, where repressed emotions and fears reside. Calling your sister may symbolize your need for connection and reassurance during this time of separation. Overall, this dream may be a reflection of your subconscious processing the fear of losing your family and the need for healing and stability during difficult times.