They can get along and be the best of friends or they can be each others biggest enemy! I know for my sister and I, we went through the “enemy” phase in Middle school. We couldn’t stand each other. She would scream, I would grab her arm with my nails and say “SHHHH… If you cry to momma we’ll BOTH get in trouble for fighting!”. We had that type of relationship. However, believe it or not, we grew out of that phase when we entered high school. We would still have our moments of driving each other crazy, but for the most part, Emy and I slowly became really amazing friends. Now that we’re grown up and have moved on to college/married life….