Is the head of the God Tang in the sky his wife?

No, the wives and concubines of the supreme protagonist of fate are: Tang Mengmiao (Mu Mengmiao), Sihong Shi Yao (formerly known as Zhong Wu Shi Yao), Nangong Qin Yu, Tan Taixian 'er (alias Huangfuyu), Shen Subing (Fang), Gong Sunruoxi, Tang Xinying, Feng Qingcheng, Ji Yuyan and Yuan Rou.