"You realize that you literally cannot lie to me," Derek tells her, eyes shining with amusement. "But sure, I'll let you be the expert."

Bitty's fingers are warm and smooth when they brush his throat, and Derek swallows hard. It's difficult for him to let anywhere near a spot so vulnerable, but with Bitty it isn't so bad.

"A cardigan," Derek says flatly, letting out a put upon huff. "I don't think I've ever worn a cardigan in my life."