I have 8 year old twin girls. One is beginning to swear. I try not to react to it or her developing sassy attitude. Much of this stems from her not wanting to do homework, or not completing it to the best of her ability. Just after dinner, before signing her planner, as proof of homework being completed, I asked her to correct something. Her reply was, "In your face!" I had her go directly to bed. She tried running out the door in the dark, and said she wants to run away because we love her sister more. I'm worried she will run out fast, and get hit by a car on our busy street. What do I do?