The fourth stage.

Curiosilus' constructs began to upgrade themselves more and more, looking more and more humanoid as the days passed by. The originals had taken a liking to the female form, in fact following Curiousila's body, while the male formed constructs began to become more anatonically accurate, their faceless heads growing red robotic eyes and large metallic dildos sprang from their crotch.

By this point Curiousila had made a shrine to Tzeetch, seeking his knowledge and such as the automata upgraded themselves even more.

Not only that but Curiousila began to create little "toys" to pleasure herself with, the constructs recording her every move and following her as a chick follows their mother.

The constructs soon began to have "intercourse" with each other. The female like constructs had small holes in their crotches, and one large hole for a mouth. Repeatedly sucking and fucking the long metallic rod which the males had created for themselves.

Curiousila's depravity prompted her to take one final measure, she would attempt to contact Tzeetch from the book, allowing his knowledge to enter her mind....

At this point the Techpriests above had already contacted an Inquisitor, a woman named Lilys Mortara, a Witch Hunter in tight black armor (similar to a corsette) and a large with hunter's hat, accompanied by her own shainsword and bolter pistol..

However, back to Curiousila, soon she created ritual circles, an infernal machine and other things.

And finally about detroy her Forgeworld..