At the beginning if this game you had the choice of ether knockingbgirls up or not with the potions of Fertility & Barrenes, but the only way to continue each girls story is to get her pregnant. Meaning the potions of Barreness have kind of become redundant compared to fertility potions. I would like to see if Tink can think of interesting ways to use this potion in later quests so there not a waste of ingredients or time. For example I think we could of just given a Barreness potion to Tom, instead of making a "fake potion" how is he gonna know the difference?
In future questlines there could be new females who we must compete with other men for & perhaps we can spike the rivals with Barreness so they cant knock her up, leaving MC to claim her womb with Fertiliy for example. Or like if MC & Maghda have a daughter mabey he has to use them to keep her safe from Dolf (because I doubt an ogre will care about the morality of incest lol).
I dunno just me spouting, but i think they could be used in interesting ways 8n later quests.