This dream may symbolize a desire for new experiences and a sense of adventure. Your sister-in-law, who is German, represents a connection to a different culture and way of life. The fact that you are both attending the same college in Germany suggests a strong bond and shared goals. The presence of familiar faces from your grade school days may indicate a longing for the past or a sense of nostalgia. The crowded escalator may represent the challenges and obstacles you may face in pursuing your dreams. The trapped mouse on a sticky trap could symbolize feeling stuck or trapped in a situation. Your sister-in-law’s departure and return to class may symbolize a sense of independence and individual growth. Overall, this dream may reflect your desire for new experiences and personal growth, while also acknowledging the importance of family and connections to your past.