Lets talk about non-consentual alien abduction pregnancies...

You don't need mods to prevent this. Just reset sim as he investigates weird light. It stops them going , no pregnancy and they still get the abducted buff. And, of course, you can send alien baby back to home world.
I usually follow what my sims want, that's the way I like to play but the only consent needed in my game is by myself controlling the mouse :)