He should include Mia's grandma & Makith as well. I know you probably think I'm crazy for saying this but for an old lady, Mia's granny does look hot & who know's? Tinkerer can create a quest that will turn the both of them into fertile beauties.
I personally doubt that will happen. Not gonna shoot down anyones preferences but I just dont see it. The whole point of the game is impregnation. Both Mia's nan & Makith are old enough to have gone through menopause. There body literally dont produce eggs.
I can hear u already calling out both Jenny & the vampires but there is an explanation tho this that can be explained in game. Enhanced Fertility was created to fix barreness (in both men & women). Now Jenny was barren yes but her body was at an age that could still produce eggs, she just needed the potion to trigger production. The vampires were all changed at ages where there body was still able to produce eggs. As immortal undead (not reanimated, but also not truly alive) vampires throughout fantasy & folklore have been able to breed with mortals, specifically males can Impregnate women with Dhampires. With Enhanced Fertility Mc was able to jumpstart the production, like with Jenny. The possibility was there, the body just wasent co-operating. We know there needs to be eggs because the diary from the Priestess that made Enhanced Fertility potions even states she was looking for a suitable subject. She chose an older woman who was barren but still able to produce eggs. The woman said she had no intention of having kids at her age. But because her body WAS in fact capable of making eggs she was a potential.
But if there are no eggs left to fertilise at all? I dont think it will work. I could be wrong. Tink may add this later. But even ignoring all that I dont see Mia being cool with MC banging her nan lol. I just dont see that working out...
SIDE NOTE: I feel like creators also prefer to add in things they ether enjoy themselves or things they are comfortable working on. Tinkerer may decide that OAPs are not his thing & dosent want to animate that... to which as a creator it is his prerogative to make that choice. Same way as it's also his right to do so if he decides he wants that.