Sharing a bedroom in the family can be a practical solution for families facing space constraints. In this article, We explore whether opposite-sex siblings can comfortably share a bedroom and what factors contribute to their sharing success. We also delve into the factors influencing when to separate the children and provide suggestions to enhance the sleeping experience for both siblings. Through personal experience and research, we aim to provide a comprehensive guide for families pondering the decision of whether to let their sons and daughters share a room.