Secrets become gossip because they are a very exciting detail about an oftentimes complex situation. So when a gossiper comes to you with her first piece of information, you can bet that it will not be her last. As one or two simple details develops into hour-long conversations about the event's latest happenings, suddenly you realize that you have wound up in something that is much bigger than you ever intended it to be.
Gossip than can be like a spider web: it's easy to get caught in it, and once you do, it will only get bigger. You never entertain a gossip "just one time."