I was thinking of making my own "Isis's Heresy" idea were the Emperor made Daughters instead of Sons, Matriarchs instead of Primarchs. And, he made 12 instead of 20 (making it more like Jesus and his disciples). Thus, he has Femmarines (or 'Super Sluts') instead of Space Marines. This also causes sex to replace violence in this version of 40k. Sexual subjugation is used when possible. Though, many forms of Xenos need to be put down the old-fashioned way. In this version, the Emperor falls to his own libido and fuses with the Chaos God of Lust, Slaanesh.
Below is a story I originally wrote as a “choose your own adventure” entry at Writing.com. I’ve stitched the main path of that story here for your enjoyment. If it seems a little choppy in places, meandering, or if the characters ask themselves questions that they immediately answer, now you know why!
Most Girls have penises then get bigger, then big brother gets sent to a ratty, small penis school while little sister goes to a luxurious big penis school and gets even bigger.
Inspired by chikahii’s art