Derek looks steadily back, not moving his hand away as he feels the tension ease from Stiles' shoulders and his scent goes at least a little less anxious and distressed. "The second you get home. And don't hesitate to call, even if you're not sure something's wrong. Don't take stupid risks." Because if anyone's going to do something stupid it's only marginally less likely to be Stiles than Scott. "And don't say anything while you're there, they're probably listening to everything."