I'm not able to get children to give birth

bug or feature to balance builds?

Dameon i dont know, usualy characters can give a birth and get pregnant, but it can take some time

who is father of this kid? (races for both parents)

i m not sure if you can breed with your own kids turning your family tree into cicle :D

afaik there was some small bugs with breeding halfkins with beastkins

there is a trait "Interfile" that lower the change of getting pregnant by girl

Tried the below configurations, no pregnancies:

1. player daughter futa halfkin  cat with futa goblin

2. player son beastkin wolf with futa goblin

3. player son beastkin wolf with dark elf

4. player daughter futa halfkin cat with player son beastkin wolf

It definitely does work, but there may be something else going on. Do you have any mods or tweaks installed?