You have to take into account how your actions today can best influence the child tomorrow.
^^^This, 100%.
Your aunt needs to get her act together, and get some help. Not to save the marriage but to get the hell out of there. And with him now turning to the kid...time to call in DFACS, CPS...whichever you have in your area, and get that child out of there ASAP if possible.
Whatever you do...don't commit a violent crime to solve a violent crime. That screws up your life as well as the aunt's/kid's.


