Derek raised an eyebrow at Stiles' attitude. He'd known the boy was upset with him, and had let him stew for a good twenty-four hours before arranging for the boy to be brought down the hall.
So, the guards were probably unnecessary, but he wanted to communicate to Stiles that he was only going to see Derek on Derek's terms, no matter how he shouted. The werewolf was unamused by the boy's bratty tantrum, and things were going to change, once and for all.
He dismissed the guards with a short nod and crossed his arms over his chest as he faced down the angry human.
"There are other slaves who are helping Miranda," he said, first. "And this isn't her first labor. She'll be in that laundry room until her water breaks--just like last time. Her babies are perfectly healthy, but thank you for your concern." It showed that Stiles could, if he wanted, actually think about another person's situation than his own.
"How are you settling in?" he asked next. "Isaac tells me you didn't talk to him last night when he knocked."