Celestina is fuckable charachter? WTF? No magic glasses can change fact that you pleasuring horrible creature. Not only she is ugly old hag, but she have even more ugly personaility, rude, ignorant, horrible matchmaker who ruined a lot of villager lifes, took bribes to marry Holly and Waldo and other indecent things. She at best deserve punishment for her deeds, not dicking. I know its optional route, but realisation of it is horrible. Player didnt have actual choice to react utterly negatively to this idea, you just can choose to not play this route further after kissing that thing.
It would be completely another matter if instead of heartless old hag this role took nice slavic type granny, whose feed mc with a lot of food, pamper him, encourage when needed etc and did all of it from pure heart. And mc having magic glasses considered the idea to give some love for poor lonely granny, who was very nice and helping to him.