In Jainism, the principle of ahimsa (non-violence) is of utmost importance. Jains strictly avoid harming any living being, including animals and humans. Eating meat of any kind, including what you referred to as "sister meat," is strictly prohibited in Jainism. Jains follow a vegetarian diet, and any form of violence or harm towards others, especially family members, is considered a grave sin. Jain teachings emphasize compassion, respect, and non-injury towards all forms of life.