Stiles sometimes has some self restraint, which is how he manages to let Grace's cancer sticks go without comment.

He does give the back of her head a look though.

"You sure dude?" he asks Raph. "I've got some cash."

And after all, they are helping him, weird as they are. He ought to at least offer to pay his share.

"This is California. Pretty sure this is like routine."

That's what happens when you work late nights at a convenience store around here. It's not like there's much to do in Beacon Hills when you're not hunting supernatural creatures.