Davis returned to his seclusion chamber after cleaning himself up in Evelynn's room.
It wasn't that he just instantly returned after trying to impregnate her. He spent a few hours cuddling and chatting with her before he returned to his room.
He sat cross-legged on the bed and only took a few seconds to enter meditation, perhaps because of having his mind cleared and emptied out from worries after the intimate session with Evelynn that progressed to the extreme.
Using Fallen Heaven's devouring prowess, he started to devour the soul essences that were kept beside Fallen Heaven all this time. In total, there were seven soul essences around Fallen Heaven. These seven soul essences revolved around Fallen Heaven like they were planets orbiting the sun.