Unbreakable Vow

'"This is an Unbreakable Vow we're talking about. In case you didn't catch on, it has to be unbreakable. Okay?" asked George. Fred nodded vigorously. He didn't want to do this.' This is for loki-laufeysons' Sibling Relationship Competition, and I got given Fred and Ron. No, there is no incest. Don't get the wrong idea, please.