Looking for a medieval doujin/manga

The premise is a sorcerer or something has to leave his shop and his wife for whatever reason. Before he does he puts a chasity lock on his wife's corset in front of her bust. It enchanted or something but she's still going crazy, later enters the mans apprentices looking for the sorcerer. The mans wife tells him he's not there, and she looks in pain so the apprentice breaks the lock that was enchanted thinking he was doing good. And then she makes him drink a potion to make his cock huge and they fuck like rabbits. I literally can not find this anywhere and I have no idea what it's called, please help. Thank you.