The Emotional Widow- the story of Natasha Romanoff's sister

Katie May Romanoff is the 10 year old sister of Natasha Romanoff. She is enrolled into SHIELD Academy, and Nat teaches a class there. However, with Katie's severe emotional issues, Yelena, or Nat have to be with her at all times. One day, she is left on her own, which leads to a very rare but serious crime. She was at her program they have set up for her when they aren't available, which was a in home program, and she got scared when the dog started barking. She lost control of her actions, and forcefully kicked the dog, which was a chihuahua. Now Nat had just pulled up, and heard Katie crying, then the dog yelp. She ran inside, and the care taker was cuddling the dog, and looking at Katie.