(CNN) -- After a six-week operation dubbed "Extra Sugar," police determined that a New Jersey donut shop employee was offering more than coffee and sweets to her customers and arrested her on a prostitution-related charge, police said Tuesday. Melissa Redmond, an overnight worker at a Dunkin' Donuts shop on U.S. Route 46 in Rockaway, was arrested because she was offering sexual services for money, according to Detective Sgt. Kyle Schwarzmann of the Rockaway Borough Police Department. The original anonymous tip came in early June and police started surveillance on Redmond, 29, soon after, according to Schwarzmann.