She already have two/three/whatever dragon daughters. Or they are adopted?
Couldn't the dev make her plan more like a daemonculaba or something? An evil mean to reach her goals and let the player be source of an alternative plan if they want a "good ending"? Also then come the question of what happen to the mind of someone that lives for a long time without any empathy and moral compass, abusing others for their own contentement and then regaining them (if you consider the person was normal before being corrupted)?
You know, good story, even fantastic, should have only one 'deus ex machine' in it.
At the example of anime, ordinary japaneese schoolboy find in a forest SUPER MEGA GIGA ROBOT DESTROYER 9000. For now his and okay plot move. But usually after it follow 'ordinary japaneese schoolboy instantly figured out how control SUPER MEGA GIGA ROBOT DESTROYER 9000' and 'near SUPER MEGAGE GIGA ROBOT DESTROYER 9000 was also SUPER MEGA GIGA SWORD/GUN/INSERT 9999 that are compatible with afformentioned robot' and finally 'after ordinary japaneese schoolboy gets in into SUPER MEGA GIGA ROBOT DESTROYER 9000 and picked up SUPER MEGA GIGA SWORD/GUN/INSERT 9999 SUDDENLY an enemy appeared SUPER MEGA GIGA STAR DESTROYED EL CHUPA_PAKA_KABRA'. And this just in ten minutes of first series. The problem here is it have too much inexplicable coincidences (how robot get into forest? why nobody find it sooner? why schoolboy knows how to operate unknown machinery? how gun get there? why eminem appeared only when schoolboy was ready? etc.) that are not explained in later series.
If you think about it, almost all more or less popular histories (good I mean) are follows this path, one unreasonable assumption, that are not explained, per story.
At the example of disneys cartoon "Atlantis: The Lost Empire" (because this what my tv shows right now). All it plot rotates around "lets assume there are some group of peoples that have a way to literally use magic for pretty much everything". There are no SUDDEN reveals of a new things that completely ruin all previously created picture of a plot.
Quick and rough overview of its story.
There are a buried under a water city in the middle of an ocean.
Research expedition goes to it on the submarine.
At the entrance submarine was attacked and destroyed by a magically powered golem (read robot).
After they get into a city, part of an expedition stole from it main energy crystal (effectively a nuclear reactor).
Other part of an expedition fight with a first part.
Other part wins and returns energy crystal back into a city.
The end.
You can check in same way other popular films/franchises/etc. Like star wars (old one only, assumption 'magic are controls a universe'), aliens (assumption 'rape dream monster are real but they want blood instead of sex'), terminator (again, olds only, assumption 'time travels are possible' not 'war robots exist' as you may be thinking), and so on and so on....
'Jizz' dude, what does it have to do with Corruption of Cait 2?
Right now story have too much holes, all of which cant be plugged with just one assumption.
Lest strat from the beginning.
IIRC, opening of a portal (from the beginning of a game) are possible only once in a...fuck know how much...
Okay, everything is good so far.
Even after portal are opened it allows to send only one thing from both sides, again IIRC
Everything still good...
Cultists have throw in portal Cait sister (Whats her name again? Caline?) to in return get some kind of in game universe analog of Necronomicon.
Still good...
But then SUDDENLY portal also let pas through it a horse cock wielding demon.
Okay, what a fuck? Lest forget about horse cock. First of, it breaks esteblished five minutes ago frames about "one thing per side only". Second, what, this daemon she really were siting near this portal expecting that "yee, it opens right now...any moment now....now...."? Even if yes, portal can only be opened from 'this" (where game happens) side, again IIRC. How does she know when exactly it would opens up?
Lets dig further.
Nobody seems to care that there are cultists that are make human (are furry counts as a humans??) sacrifices.
Imps are attack/rape everything that they can but nobody minds too much (partially true, furry dwarves are under siege...or did they?? Fuck, I right now live in a country where war...sorry 'denazification operation' happens, on a territory where not battles were occured, and probably never will, but we still have here regular patrols, curfew, air-raid warnings, and so on)
Okay, I gone too far...
What I mean is, you asking for a correct questions from a game, that have fatal defects in its basic story elements. This should be fixed before go further.
MAYBE, just
MAYBE, further down a road this questions will be answered. But I doubt it, taking into account how game was developing in past time.
time is better spend creating a racist species without having any of them being different from their stereotype because everybody knows that member of a country are all the same.
What?