As the title implies, I've been trying to have halfkins give birth to beastkins. Based on the race description it should be possible. However, I can't seem to do it no matter the combination I use. 2 halfkins, beaskin with halfkin, male with female, female with futa, futa with futa. None one of the children have come out as beastkin.

Therefore, I'm wondering if I'm missing something, I need some quest or item or if the mechanic simply isn't implemented.

Got my answer from the discord chat. It is impossible.

To anyone reading this, I made a mod that allows Halfkins to have children as the game describes, it's called "Halfkin Offsrping Expanded" and is posted in the mod section.