Some clients treat freelancers as if they are on call at all hours, sending messages late at night and expecting fast replies on weekends. It starts small, but before long it can take over your personal time completely. Setting boundaries sounds easy in theory, but in practice many freelancers worry about losing the client if they push back. It becomes a test of how much you value your own time versus how much you need the income. How do you manage a client like this without damaging the working relationship?