I guess the title says it all; I dreamed my brother was killing my sister's cat in a particularly gruesome fashion. I could hear the cat howling and making awful noises, sort of like bagpipes--only much more horrible. Does this dream mean something about my brother? About my sister? About me? I haven't told either of them about the dream, and I think that's best.
To me it would mean that my boss will 'kill' my enemy at work. ymmv. No, it doesn't mean that it concerns your brother, sister or yourself.