Edging, Cumflation and more! (M seeking F)

Basic premise: Girl tricks her boyfriend into taking an experimental drug, maybe she slips it into his food or tells him its an aspirin or something, but it causes him to experience extreme increases in both sensitivity as well as cum production, with a twist! It's not just any drug, it's a spell she bought from a witch that will make it so he can't cum with out her permission. She proceeds to use it to tease him relentlessly, making him experience dry orgasms that trap him with aching blue balls, or she uses her control to make him jizz himself in massive amounts whenever she sees fit. Plus she quickly learns she has an inflation fetish, loving the sensation of getting him backed up for days only to have him release every last wriggly little swimmer deep with in her body. I figure it can be played a few ways depending on the mood, it could be either a shared fetish where they both want this, or even revenge where she's getting back at him for cheating on her, details can be discussed at any time.