On AO3.
This is part three following Surprise Surprise and Laugh or Cry.
Stiles’s father’s smile didn’t break the tension Derek felt. The man had aimed a gun at him!
And Derek’s mom! He’d let her down badly, staying out all night, on a school night! She’d ground him forever.
But Derek liked Stiles. Stiles was funny, always surprising him. He’d never met anyone like Stiles.
They hadn’t even done anything but snuggle and giggle all night, the best sleep-over of Derek’s life.
“Mr. Stilinski,” Derek started to explain. “I mean… Sheriff.” He paused.
Stiles’s dad smiled again, said, “Call me John,” and Derek instantly forgot everything he was just about to say.