Until Death Do We Part

Lamia is a reaper. She is just one of hundreds, who aid humans and animals alike in their last days of death, accommodating them to the afterlife. Humans who are destined to die alone will be visited by a reaper, who will sit by their side until the end. Lamias story starts when she is assigned a human who is doomed by an untimely death, only this time, something odd happens.
Lamia feels warm, her cheeks blush and her cold heart races. She feels alive, as a human would.
What could this mean?