That's some serious mundane use of superpowers.

Tldr: she used Coma on Gran, and got pregnant of him. He woke up months later.

Bold Nio is bold.

It appears that Nio simply squeezed Gran out hard while he's unconscious the whole night to the point that her stomach is bulging.

Wilfriback said:

That's some serious mundane use of superpowers.

Tldr: she used Coma on Gran, and got pregnant of him. He woke up months later.

Bold Nio us bold.

This seems most likely the case, based on his other works with Harvin. Although I prefer the idea she's kept him under a spell for many months.

Frawnkenstein said:

It appears that Nio simply squeezed Gran out hard while he's unconscious the whole night to the point that her stomach is bulging.

He's also done pregnant characters Scath and Halesena.
Wish it was pregnancy with Nio tho.

Steak said:

This seems most likely the case, based on his other works with Harvin. Although I prefer the idea she's kept him under a spell for many months.

But the text more implies this is a case of cum inflation not pregnancy.