At 2 a.m., one partner lies awake in the spare room wondering if this is the beginning of the end, while the other lies awake in the main bedroom feeling equally alone. The fight about the spare room is rarely about the room. It is about sleep, meaning, and the fear that separate beds will become a separate life. This book helps a couple in that conflict talk constructively, design a bounded trial of separate sleeping, and protect closeness while protecting sleep. It does not diagnose sleep disorders, name medications or supplements, or tell you how many hours you must sleep. It does name the red flags that need prompt assessment and routes those concerns to a clinician or sleep service. The couples in these pages are illustrative composites, not real clients. The goal is not to win the argument or to prove that separate bedrooms are right or wrong. The goal is a plan you both can live with, reviewed on a schedule, and changed when life changes.