The vampire cure will now properly cure your vampires so they revert to quite normal Sims even if they had fulfilled a vampire aspiration before seeking cure.
Do your Sims never discover their pregnancy on time? Usually in the game they learn about it after 24 hours, unless of course they systematically wanted to conceive a child. However, this may sometimes not happen if you are using third party mods.
So excited to share the mod i've been working on! Here is the Love Triangle Mod. Mapping this concept out was a bit difficult because I didn't wasn't sure how I was gonna go about creating the base structure. But I think it turned out fine in the end.