Because she thought the man might show up for another funeral.
Thanks to all who gave it a try; clearly you're all creative and kind of crazy, true writers, but not too good at thinking like a sociopath! Salute.
It's because I've been reading this and this (and also this, although for once I didn't start there), and then started doing some research, as one does, because I'm so curious about people like that.
Oicks, shit, I want to go on but I just realized I'm very late for work. Stupid work.