Send my muse "Let's have babies together" to see how they'd react.
The werewolf’s head snapped up instantly at Stiles’ words. He’d been absentmindedly stroking the puppy in his arms, losing himself in his own thoughts when Stiles’ words were like a cold bucket of water over his head. Wide-eyed, Derek turned to the human sitting across from him.
"You want us… You want us to have babies?" Derek asked incredulously, pinning Stiles with his stare. "Together?"