Question: At the end of *Oathbringer*, Hoid grabs a spren (a Cryptic, it seems) from the ruined Alethi palace.

> 
> “I know you’d rather have someone else,” Wit said, “but it isn’t the
> time to be picky. I’m certain now that the reason I’m in the city is
> to find you.”
> 
> 
> *Oathbringer*
> 
> 
> 

I get the strong impression that we’re supposed to know who this spren was meant for, but I can’t figure it out. Surely not Aesudan?

Answer: 
The answer is a firm **yes**.

> 
> Everything inside me came undone as I stared at the tiny porcelain face of the half-vampire, half-human baby.  
> 
> Twilight, Breaking Dawn
> 
> 
> 

And from the film of Bella pregnant with Edward's baby.
As evidence by the fourth book, yes, vampires in twilight can impregnate a human. typically it doesn't happen, as most\* vampires would lose control and end up draining said human of blood during the interaction, or break them. This can only happen in Male vampire with female human relationships, as a female vampire is in stasis, and no longer has monthly fluctuations, whereas a male vampire, it seems, still has reproductive ability.