When Deb dies in Dexter, it marks an emotional conclusion for Dexter and Debra Morgan, which Dexters last line in New Blood betrays. Time and again, in the original series, Dexter resolved that he could not feel love, but this gradually changed as he realized there were two people he genuinely loved: his sister Deb and son Harrison. Debs death, which Dexter felt responsible for, broke him and was the catalyst for why he decided to abandon Harrison and ride into a hurricane in Dexters controversial season 8 finale.
