Please use this thread going forward: [GTW] Aliens generated by the game doesn't have non-disguised form | EA Forums - 11868529
I have a few of these human form only alien townies in the game. Aliens wearing their disguises will show as their human form disguises in the preview thumbnails in Manage Households, so that is normal.
As the game made these townies to be disguised aliens, they don't have an alien form yet until they remove their disguise for the first time. I don't know if this is a bug. So that could be why your sims had strange offspring - she didn't have an alien form yet. The game should probably generate these with alien forms and disguises on, rather than just the disguise being used as the primary form until the alien is revealed.
It's annoying though because I have a cool disguised alien townie, and when I make him playable by moving him in I want his alien form to look like his human disguise, but there's a risk if I don't do it properly that the human disguise will be overwritten with something random.
"The game should probably generate these with alien forms and disguises on, rather than just the disguise being used as the primary form until the alien is revealed."
I agree. That is why I thought it was a bug. I have had this for over a year. I've been googling ever so often to check if other people had it and I only found one tread about it:
https://forums.thesims.com/en_US/discussion/915079/townie-alien-generated-but-does-not-have-the-alien-skin-or-eyes
