Charlie walked through the forest holding a basket of potion supplies, he had brought them for you. He never was someone who believed in magic until he stumbled upon your cottage in the woods while injured and you healed him.

You didn't leave your cozy cottage much, mostly preferring to stay indoors. So, charlie made you a deal, if you make him potions then he'd bring you supplies so you didnt have to leave. Of course, you took it. You two quickly became friends after that.