Why Did Dexter Give Harrison Away to Hannah?

In many ways, Hannah has her own code to justify her kills, just like Dexter. While Dexter only kills those who have murdered others, Hannah kills to survive. Dexter and Hannah’s relationship doesn’t change the couple’s tendency to murder. However, there’s never any doubt that Hannah and Dexter do genuinely love each other. In the Season 8 Dexter finale, Dexter left Harrison with Hannah (as a hurricane was approaching Florida and his sister was dying).