PattyGolden:
Does anyone know any? Ideally a serious disciplinary spanking, best if the crush enjoys it.
Well, offhand I'd say that the story "Crushed," by K.D. Pierre, pretty much fits that description--IIRC it involves a preteen boy with a crush on an early-teenage girl who is his older sister's close friend.
While I've written a story ("Philip's Favorite Babysitter") about a preteen boy with a crush on his five-years-older babysitter, she doesn't totally enjoy administering her punitive walloping of him, which is referred to in retrospect, nor is the spanking that's fully described a disciplinary one...

--C.K.