Dobby's Plan

Harry is married to Ginny but not as happy as he had expected to be. Dobby thinks that The Great Wizard Harry Potter Sir is in danger of being very unhappy indeed in the not too distant future - but he has a 'brilliant plan' to fix the problem, however he needs a potion from 'Master Potions Master Snape' to put his plan into action. Crack fic. Pre slash, well, maybe.