New Family and Tight Cupboards

Your family (or rather, what you have left of it) isn't exactly loving. Your father isn't the man he used to be. Your step mother and her two daughters... let's not even go there. And your sweet loving 8 year old sister? More like the devil reincarnated. But you're stubborn, you can't ask for help. The only person (ahem, creature) you have is your dog, Chewbarka. But in a turn of events you're left vulnerable, and being stubborn isn't going to get you anywhere in life.
Disclaimer: This story has sensitive subjects, and things that may trigger emotions. I am giving a pre warning as I don't want to start unhealthy thoughts, and I want to point out this is all a work of fiction.