"You can't?" Zacharias repeated, looking puzzled by this. "Yes you can. I'm telling you you can. Consider repayment done." Even though Merlin hadn't done anything.
He didn't like the way that Merlin said that. 'Not supposed to'. As if something, someone was making him stay. "There aren't 'supposed tos' in life. And if there are - well, you do what you want anyway," he said with a shrug. That was what he always did anyway. What he wanted.