“See, the professor here has leukemia.” The younger girl took out a quart of milk and drank out of the carton. “As long as she’s playing blood bank, Stefan’s return donations keep her cancer in check. If he quits”—she made a choking, gasping sound, then gave Naomi a faint pleased look. “In return she acts as Stefan’s business manager—paying bills, doing the taxes…shopping. Hey, Naomi, we’re out of cheese.” She replaced the carton and shut the fridge.