You decided to FINALLY kill the villain, cause you were honestly too tired to clean after their messes and having most of damage being put on you, but also because you were gonna retire.

Anyway after kill the villain
You didn't expect the villain to have a kid-
Yeah-
He watched you murdered his father in cold blood
(the child is unaware that his father is a villain so to him you basically killed his dad for no reason)

Now it's up to you on what you decide to do next