The dynamics of strength and desire for control between men and women vary greatly, and the reason Wen Changling could sometimes gain the upper hand was due to Xie Shang's indulgence, his "obedience." If he were not obedient, she would have no power to reject him.
Having his desires fulfilled, he was overjoyed to the point of madness.
After it was over, he couldn't bear to let go, remaining excited for a long time. Having tensed up for so long, he held onto Wen Changling as he slowly calmed down.
He wanted to embrace her forever, holding her tightly, "Changling."
"Mmm..."
Wen Changling kicked him slightly, signaling him to get up. When he didn't move, she muttered a curse at him, then called his name, as was her habit before falling asleep.
She was ready to sleep.