Once again a question about Pregnancy, are so many not reading the story and just going right for the scenes .. ok I digress.
No Pregnancy is not a thing in this world, it's explained at the start of the game where in that since it was discovered that men were not needed for reproduction, women's 'cycles' become obsolete and it is only Nami who still gets normal cycles. The absence of the Y Chromosome is also the reason why Men are such a Rare gift of birth as 99.9% of pregnancies in this world are girls.
As for your Avoidable Kinks question, just scroll up, there is a list of what's in the game to avoid some scenes you just don't interact with that area however you do lose parts of the story.
Hope this helps.