are we sure pregnancy was implemented?
Viewing post in Course of Temptation comments
Very sure. You may be facing one of two issues: 1) The chances fluctuate as the month goes on. With the buff this update brought, it goes as low as 0% and as high as 30% depending on the fertility cycle on default settings. You may be trying when the chances are low. 2) NPCs generally don't want to be pregnant, so they may be taking a morning after pill off camera.
No, there is no inclination that makes them want to be pregnant. Breeding Kink + Risktaker might increase their chances of letting you nut in them, but nothing affects what they do after in any appreciable way. You're really best off just going about things and if it happens, it happens rather than focusing on it. That's how I found my poly partner pregnant.