In all if so it could probably be a medium/long quest chain, that has you breeding and deliviring (each delivery being more difficult than the previous one) with all special devouted priest and paladin followers of Lumia's faith (like Hretha, Elthara, Selima, Azyrran, etc. ..., maybe even Liaden aswell
{through Azyrran and the player being able to convice her due to wanting to help a person in need and following her faith as aswell liking seeing how Bimbo Azyrran is so care free and happy so she uses Azyrran's Bimbo choker temporarly and becomes an Bimbo like in the hive scene to conceive a child with the player from the start or having to go a lenght of convincing her till she loves being a Bimbo and accepts having the option to also be permanantly (through toggle) an Bimbo and conceives at the end (possibly even re-use this image of her
https://wiki.smutosaur.us/CoC2/File:Liaden-Moira-Bust-Bimbo.png ,and possible repaint it with cloths if possible.).
Than there would be an future game prompt to the player if the player wants to ask Liaden to be able to use the choker again to unlock Bimbo male - female sex with her permanently in wich she lends Azyrran's choker and equipes it.
Probably even could go further into an second scene after having sexed Bimbo Liaden an number of times (with upgrading text to show how liaden is liking it more and more being an Bimbo and getting fucked) that leads to an prompt to ask Liaden to have a Bimbo threesome with Azyrran and the player in wich the choker is held by both Azyrran and liaden by the wrists and both transform into Bimbo's and have sex with the player.
Wich could ultimately lead to an new conversation where Liaden states that she finaly realised in her Bimbo state that she loves having sex with males in that state thus wanting a choker of her own to be able to toggle between her two different states of being an Bimbo and normal Liaden (wich still is a lesbian), and by so when searching on how to do that they discover that Ogrish had not used all of the core and didn't throw it away aswell but gave it to Ivris for safe keeping so not to fall in the wrong hands}
[it would only request the ones available to the player, yet the more the player has available the better the final reward for this part of the quest would be]), all possible valkyries and than with Lumia herself (each valkyrie for an respective race soon to be parents, making Lumia's baby being the same as the players race or starting race [as it can be that the champion is an demonmorph]) wich she also will accompany the player for maternity duty (the deliveries will be made to special powerfull devouties of Lumia's faith wich are unable to concieve namely priests/paladins, that's why the baby has to have an mother that has an string connection to the sun godess's faith/power).
Than as last you would have to search the world for the last compatible raced valkyrie (wich there isn't any in the keep of light), so to be the mother of that baby (you could add an new valkery in this way to the game) for you to breed with.
When you find that valkyrie she in turn will need the champion's help in an difficult task she has at hand aswell before she's able to do the task of conceiving and helping in the delivery in the final very difficult encounter tasked by Lumia. The reason Lumia doesn't solve the problem herself is because like the 'living gods' said previously there are things they don't intervene in.
