Most of Chinese think Yuhuangdadi(玉皇大帝) and Wangmuniangniang(王母娘娘) are husband&wife, they work together to control all the gods(gods are not like western gods, they have 仙 and 神), but there are multiple versions of myths(books) and rumors mentioning them, none of them tells the relationship of them for sure, we can only deduce their relationship from the context. From different versions of sources, they can be: 1. husband&wife, 2. colleagues, 3. sister&brother, 4. mother&son.