Derek smiled then, pleased, holding the dildo deep in Stiles' throat. He wanted to remove the rubber cock and replace it with his own, to feel the boy's throat hot and tight around him. He wanted to come in the boy's mouth, to have the boy come with Derek's cock inside him and not before.
"...not until I let you," he finished. His thumb smoothed over Stiles' cheek. "Not until your lips are wrapped around my cock."
He pulled back then, pulled the dildo out and set it aside before undoing the button of his jeans and tugging the zipper down.