Hi Tucker's dad, I'm new to this forum, but I'm familiar with basenjis (and alcoholic relatives too, for that matter :)).
I hope that you've found the right solution, and while there are many here advocating the Rainbow Bridge, I can understand completely why you would resist that option. I would feel the same way, that I would be responsible for my dog's behavior and I would seek every avenue of resolution….
With that being said, I do advocate finding a new home for your great alcoholic aunt.... You said that she was cloudily related to you, and if that's the case, I think she is a disruptive factor that apparently Tucker didn't agree with.... for the record, I am not trying to justify his behavior! However, if a drunk old granny that reeks of cigarette smokes approaches me.... it may be hard for me to control my instincts, and I may actually plug my nose, gag or shiver, or run away!
(I hope that made you smile, just a little. :). ) In all seriousness, if your greatly drunk aunt is still there, there is no family rule that states you must have alcohol available, or that you permit alcohol in your home. And if she's already burned one house down.... I hope you've curtailed the smoking to the outside patio.
I think you have to try to fix both issues.... perhaps you can lean on another relative to take care of Aunty, so that you can focus on what's important to your heart?
Just my two cents. Take care!