The original version of this has been around for more like 15-20 years. It was posted on a long-defunct site that was called I think 'Butchered Sistermeat' or something like that and consisted entirely of stories and really unpleasant naive drawings (some with parts, but only parts, obviously traced from photographs) of what appeared to be a guy's fantasies of murdering and eating his sister, who I seem to remember is Maritta in this story. The original version was longer, didn't have the vore part, had a different ending and included an extra segment in the middle where serious criminals who were deemed not fit to eat were executed by being fed to piranhas and so on.