Heare out
I am not good enough to draw it just yet but
I eventually want to depicted Fulgrima when she was still a humble miner with a flat chest and simple cloths
.
once she overtook her planet as sign of the prosperity she brought to her people she got some surgery giving her big boobs and more revealing Outfits
.
Once she gets possesed by Slaanesh her outfits get scandalos to the point that she wears next to nothing
.
And with her Demonhood she grows not just bigger tits but also a second pair leaving her as a grotesque parody of the woman she once was while demon looks like her breast could explod at any moment