I'd call him out on bringing his kid to a climactic showdown. I mean that's just bad form right there. I mean, he knows I wouldn't want to traumatize the poor kid, I'm the good guy after all.
Then I'd try to convince the kid to leave if the villian didn't. And worst case scenario, Apologize to the child for killing his/her dad.
Afterwards I'd see to it that arrangements where made to care for the child. Check up on him/her regularly, ultimately I expect the child would either A) understand why I felt it nessesairy to kill his/her father and accept it, which I would do my best to achieve; B) chose to take revenge on me, to which I would allow a climactic showdown of my own, and attempt one last time to explain things, failing that I would accept death as pennance for killing his/her father; C) the child would not only see my point of view but accept it as their own and become a sort of uneasy hero/sidekick in their own right.
The child would not die given the option; even if the only other option was my dying. Although I guarantee the kid's dad dies. But the way I see it, by stealing the child's father I have an obligation as the good guy to do everything in my power to fill that role. It's just not right to leave him an orphan and he's to young to be held accountable for his father's crimes/sins/deeds. Killing him would only make the murder I'm already going to commit even heavier a burden.
Then I'd try to convince the kid to leave if the villian didn't. And worst case scenario, Apologize to the child for killing his/her dad.
Afterwards I'd see to it that arrangements where made to care for the child. Check up on him/her regularly, ultimately I expect the child would either A) understand why I felt it nessesairy to kill his/her father and accept it, which I would do my best to achieve; B) chose to take revenge on me, to which I would allow a climactic showdown of my own, and attempt one last time to explain things, failing that I would accept death as pennance for killing his/her father; C) the child would not only see my point of view but accept it as their own and become a sort of uneasy hero/sidekick in their own right.
The child would not die given the option; even if the only other option was my dying. Although I guarantee the kid's dad dies. But the way I see it, by stealing the child's father I have an obligation as the good guy to do everything in my power to fill that role. It's just not right to leave him an orphan and he's to young to be held accountable for his father's crimes/sins/deeds. Killing him would only make the murder I'm already going to commit even heavier a burden.