Feng Wujiu is a God Venerable, with a high-ranking Primordial God for an elder brother. Everyone watches closely to see who will become his partner, though perhaps not everyone is vying for the position. Then a single marriage decree from the Imperial Palace makes Feng Wujiu a happily married man at a young age.
He thought he would get to admire the emperor's imposing figure up close. Instead, as soon as they married, the emperor rushed off to cultivate in seclusion and stayed there for decades.
Feng Wujiu: I've put up with this for decades. I'm done! I'm going out to have fun, to cut loose, and to find a new love!
So when the emperor finally emerges from seclusion...
Emperor: Where is the empress?
Guard: Out of the palace, having fun.
Emperor: ...
Feng Wujiu is having such a good time he forgets to go home. When he suddenly runs into the husband he's been married to for decades, he doesn't recognize him. He boldly flirts with him: "What a handsome gentleman. Are you married? If you don't have someone in your heart, what do you think of me?"
Lu Huaixu isn't normal. His extraordinary strength has led the living beings of the Six Realms to honor him as the emperor. The Heavenly Dao joined in the fun and carved out a plot of land beneath the Cloud Realm to build the Imperial Palace. He didn't care about his home, nor about marrying the Venerable God of Weiyang.
Until, after emerging from seclusion one day following their marriage, he found himself staring in silence at the empress he'd been married to for decades.
Looks good, looks good, looks good!