Blood Relation — Sean Monaghan

Sally's wondering if her brother Bevan will decide whether to donate a kidney. She doesn't know if she wants it or not. An asteroid belt station running on limited resources is no place for a kid to have kidney problems. The dialysis machine is clapped-out, and the medications have expired. Going through with the operation is not an easy choice for either of them. A short story, originally published in Outposts of Beyond. The ebook also includes two bonus short short stories, "Bergamot Silhouetted" and "Hard Suit Lock."