"igazor;c-16105187" wrote:
Just to add a small bit of info to the above excellent analysis if I may, on an alien male pregnancy the one who was abducted is not really the genetic parent of the child. They are acting as a surrogate to (presumably two I guess?) other alien parents not in the homeworld. Pregnancies that form by way of woohooing, no matter what the genders or alien status, are subject to the usual rules. :)
If I ran a recent test correctly, in an unmodded game I think the alien child from an abduction will only have one parent on the family tree, the male sim who had the alien pregnancy. I think it's NRaas SP (possibly along with the Population) module which adds an alien parent to the child's family tree. The added parent appears to be a random member of the alien household - not necessarily the alien who actually abducted the sim.
I also once took each member of the alien household into Edit in CAS and gave them each a different skintone color on the rainbow slider, along with different ear shapes and sizes. The alien babies were all the normal green with the usual alien ears. It seems that the game creates a new alien sim from scratch for abduction children. I've also adjusted custom body sliders for each alien sim in the alien household, but I don't remember if those were passed to abduction children in that game.
As you said though, alien children from TFB are subject to the usual rules.