It's Complicated — Catherine Green

Sally Frost is a mild-mannered NHS hospital nurse by day (and night). When she is not at her human job, she follows a rather more exotic path as lieutenant for the Redcliffe werewolf pack. Her alpha, Danny Mason, battles to hold his pack together, and he calls upon his lovelorn, reliable right-hand woman to get the job done.

This short story compliments the Redcliffe Novels series that is widely available in bookshops and online.