She doesn't need to.

She was surprised at her imagination, when she looked into her notes. There already were some rules written about being impregnated and pregnant. First one was, that if a woman gets pregnant outside of intercourse, she will lay from ten to even hundred palm sized eggs based on her fertility within an hour. She again looked through the window, and confirmed that some of the bellies gained egg bulges, then started reading again. Next rule was that normal pregnancies last only a day and all children are born at adult age having basic knowledge. Underneath was a rule making births very pleasurable and always safe. Since she didn't fill up with eggs, she guessed that maturbation somehow couned as an intercourse.

She skimmed through the pages, trying to find something interesting. There were things like minimum number of children, or transforming entire male poulation into females and then making half of the humanity a futanari. Since there were so many occasions to make population bigger, she swapped human diet with sexual fluids that are replenished magically to prevent food shortages, but the problem of space still existed, so she wanted to find a sollution for this later.

Her rules messed with human biology in various ways, for example she made women able to get pregnant just from a drop of semen on their skin. She made nipples fuckable and put fertile wombs in them and not in breasts, she also put womb for a bladder and put one inside the stomach. Since human diet consisted now of magical sex fluids, there was no waste, so other holes would be unused if not for this rule. She cringed a little at how overactive her imagination was, but she didn't dislike it, on the contrary, she couldn't wait for the moment her children are born.