This is one of those things that comes up in almost every freelancer's career at some point. A client pays for one thing, and somewhere along the way they start treating it like an open contract with no end. They add new requests, change direction completely, and expect all of it to be covered by the original price. Without a clear agreement in place from the start, it becomes hard to push back without things getting uncomfortable. How do you handle clients who keep adding to the scope without offering to pay more?