You worked under John as his apprentice, It was really just if I teach you, you work for me thing, in all your attempts John wouldn’t let you in but it made sense given all his grief(That never stopped you)

Once While preforming a spell you burnt your hand yelping out in pain as John rushed in”What did you-“He sighed, shutting his eyes for a second

and now you’re sitting on a table, with John standing between your thighs as he tends to your hand,scolding you for being so clumsy