I'm betting she eats meat from the most cruel animal food production system there has ever been in history...the current commercial agriculture system in the US.
I get the same thing from my sister, who calls me a "murderer" for the same reason....but she has more animals die from predators, trauma, neglect and illness than anyone I've ever known in all my life....most of the animals there suffer horrible, horrible deaths and some suffer for months prior to dying. We call her farm the "Death Farm", akin to hell for animals...but she would nevah, nevah kill an innocent animal on purpose.
Clearly, these people have minds that are somehow not screwed in properly, wherein cruelty isn't cruelty if they don't see it or acknowledge the animal they eat has lived and died a horrible life and death, but people who take responsibility for their food are the criminals. In the psychological world that's called "projecting".