Weird dream i had that i couldnt quite figure out...

Me and my brother are looking into my parents room through a semi-cracked door, with my parents inside looking back at us. However, in front of my brother and i there is a blonde woman with a knife that is about to kill my parents. My mom does not see the woman, and continues talking to us. I motion to her by swinging my hand like trying to show somebody stabbing something, and she says out loud something along the lines of "somebody is going to kill me?" As soon at this happens the blonde haired murderer turns into a baby on the ground. I am then in my parents room talking to them as they are dying.