compliance (гет)

“Rex—” you exclaim, feeling your cheeks heat with embarrassment.
“No,” he says, shaking his head. “You don’t get to call me that tonight, not til you earn back the right. Try again.”
“...Sir?” you attempt meekly, and the single nod of approval he gives you in return makes you ache for more.
“Now answer the question,” he tells you, and you falter for a moment before he adds, “that’s an order.”