how does one put up sibling for adoption

ima bout to disown my sister
She ate ramen then took cold water from a bottle and poured it in the broth and drank it out of a Kool-aid straw. After she was done she wraps her finger in a paper towel and dips in the water bottle, pulls it out, and then sucks on her finger saying "ooh this tastes like soap". Whos child is thisss!!? would someone like to adopt her pls i cant rn-