My 8yr old daughter pushed her 6yr old sister down the stairs.

Ok, so there may be some comments about how “I wasn’t watching my kids” and that I’m a bad parent but I don’t really care at this point.So, my husband was out in the hall painting the walls because we’re remodeling our house and getting ready to sell it. And all of the sudden my eight year old (alley) comes marching up the stairs and yelling at her six year old sister (braylie) for taking her American girl doll out of her room. Braylie said “I just wanted to borrow it, I was going to put her back in your room later” Alley said “I’m tired of you taking stuff out of my room”. So I finally said “There is no reason why you guys can’t share the doll and play together” (they both have their own dolls) Braylie said “I like her doll better” Alley said “that’s my doll, mom”. So I made them go put their dolls up and find something else to play quietly. (That lasted about five minutes)Then I heard “you took it”! “No I didn’t!” “Yes you did” Then all of the sudden I heard a huge thud (keep in mind that we have a huge flight of stairs) and really loud screaming and crying. My husband and I ran to the hall and I noticed that my six year old was at the bottom of the stairs, while my eight year old was at the top. My six year old head blood coming from her head and she said she couldn’t move because it hurt too much. My husband ran up stairs and picked up my eight year old and yelled at her saying “You know better than that” “you should never push your sister down the stairs ever” “she’s bleeding and it’s all because you pushed her” I turned around and told my husband to stop yelling at her because it will only make it worse. He needs to talk in a normal tone of voice. I told him that I would deal with her later. My husband said whatever and put her down to come help me with the one that’s seriously hurt on the floor.Long story short, braylie had to go to the emergency room for stitches on her head.And I know my husband shouldn’t have yelled at my eight year old old like that but he doesn’t parent like i do. He believes yelling is the key to get a child to listen, when I believe the complete opposite.I’ve already talked to my eight year old old about this and she told me that she was too mad and that she pushed her sister down the stairs. She said she didn’t think it was going to hurt her, she just said she wasn’t thinking. I told her that no matter how angry you are, that’s no reason to push your own sister down the stairs over a toy. She said I know mom. I told her if you’re really angry and you feel the need to physically hurt someone, you need to go to your room, sit on your bed and calm down.So really how do I punish her for this? I’ve never had anything happen like this before in my house. Both my two girls are very sweet to each other. I just don’t know why my eight year old thought that was appropriate. Any advice? via /r/Parenting http://bit.ly/2QiY4k9