I was wondering if you have a rough outline. Of the Risha mothers talk and Damion's reunion with all his soulmates. Or if that's lower down on the priorities list. Also I am completely fine with you ignoring this comment, if you want to.

I have a feeling that the end war is basically Yaweh's retirement party. With Abaddon ascending as an Aeon and taking Yaweh's place at the end of the war.

So personally I would like the maid to become a wife. But if you are only thinking about adding another wife because of his children/origin parts. Then you don't really have to since you have added a loop hole without realising it. Since Tartarus is a place instead of a creature, even if it is a sentient place. You can have it take the form of a sentient weapon, or a spirit like entity in Abaddon that stores the excess powers of his other origin parts. Then explain it with how they are different from there (siblings). For example, it can store the excess powers perfectly because it is/was the prison for the powerful monsters/beings made by the gods, and its sibling Typhon.