A secret wonder of magic was that, no matter how entangled your knots could get, it took just a second to wave your wand, recite a charm, and everything would loosen like they were made out of spaghetti.
Along with that charm, Ginny learned power dynamics from Bill, twenty different knots from Charlie, five different tricks to pull on someone from Fred and George, and exactly where Hermione liked to be tickled from Ron.
Hermione would gasp and twist and flush prettily, her body straining against the ropes as Ginny smiled and pushed it all just a little bit further.
This Harry Potter story was written by Kate Bolin. If you liked it, there's plenty more at http://www.dymphna.net/fanfic/. And you can feedback her at dymphna@dymphna.net.