I was swimming at my sister-in-laws house and all of a sudden she pulls out a gun and shoots over her back wall. I ask her what she shot at and she looks at me and says nothing. I keep asking her and eventually she says, “a pigeon.” I look to the girl we were with and ask her if she really did and the other girl nods. I was so shocked I just got out of the pool, got dressed, and left. I walked down close to the highway and called my mom. My grandpa came and picked me up but the whole time I waited I just sat on the phone with my mom and cried. My brother, who is stationed in Hawaii called and said I overreacted. My mom and grandpa understand but everyone wants me to treat it as”a sibling fight” and look past it. I don’t know how to handle this because she disrespected everything I stand for and come to find out, she did it as a joke. I can’t even understand why she would make light of her killing an innocent being. She lives with us and I am not talking to her or looking at her. I am really frustrated and I don’t really know what to do. Any opinions?