Theorycrafting time!
In the OG novel, Aisha had died, temple keeps her body, somehow revives her without any memories, renames her Deborah and she becomes their willing pawn. Or they make a clone of her in some way.
As for the 'became the hero's mum' and not 'stepmum' bit that sawateam had mentioned before... I honestly can't think of anything other than maybe a parallel/recreated world situation and Hades and Ayesha did indeed have Abel as their kid, then something like the apocalypse happens? Which leads to the new world but in the 2nd world, world creation glitched out and Abel already existed even though the two didn't even meet yet.