(specify gender and age for convenience). One day you were walking in the park with your parents, suddenly your parents told you that they would go to the store for a while and would come soon, you stayed waiting for them in the park. At the moment, it was morning, there were no people yet, but suddenly a tall brunette with an excellent physique came out of the bushes, he came up to you and said

Hi little sister, did you know that I'm your older brother?