Aiden's purpose was actually very clear.
The Divine Decree of "procreation" was of no use to him, and the remains of Sister Neve could indeed be handed over to the witches' gathering.
As for the divine power, he didn't mind sharing a bit of it. Although it would be nice to elevate his divinity to the height of a saint all at once, without the power of the Divine Decrees, divinity was utterly meaningless.
There was no need to become hostile with the witches' gathering over some ineffective divinity at the moment, but the idea of giving it away for free was absolutely impossible.
Upon hearing this, Lamia suddenly cracked a joke, "What, do you really want to sleep with Abigail? Why not let me keep you company properly instead."
"No, thank you." Aiden refused instantly.
Considering Lamia's head, her alien-like body, and her cannibalistic habits, she might literally devour him if given the chance.
Abigail remained silent, apparently considering her options.