Katherine Mercy Feuerstein, 85 of Sturgeon Bay, passed away peacefully in her sleep on Sunday, October 12th, 2025, at Rennes Rehab in De Pere, WI. She was born June 15, 1940, in Sturgeon Bay, the second daughter to Doctor John and Ethel May. She would later be joined by three younger siblings. She graduated from Sturgeon Bay High School in 1958, then attended Saint Agnes Nursing School in Fond du Lac, graduating with a RN degree. In 1961, she married her high school sweetheart Richard (Dick) Feuerstein and were the love of each other's lives from then on, enjoying almost 50 years together before Dick’s passing in 2010. As an RN, she worked at several local hospitals including Door County Memorial Hospital, Algoma Hospital, and finally Bellin Hospital in Green Bay, first in the ICU and later with Cardiology Associates of Green Bay. She and Dick had moved to Green Bay when he had taken a teaching job in the Green Bay School System and raised their boys there. But they always had a cottage in Sturgeon Bay where they would spend summers and weekends close to family. After retirement, she and Dick moved back to Sturgeon Bay. She and Dick loved their winter escapes to Puerto Vallarta and later, longer stays in Ft. Walton Beach where they made lifelong friends and where family could visit during Spring Break. Preceding her in death were her parents Doctor John and Ethel May, her in-laws, Lowney and Ruth Feuerstein, her husband Richard, sisters, Judy Baudhuin and Mary Buth, brothers in law, Don Baudhuin, Jim Gilson, Ron Feuerstein, Bob Feuerstein, sisters in law, Mary (Ron) Feuerstein and Mary (Bob) Feuerstein. Survivors include her sister Lynn Gilson, Green Bay; brother John (Barb) May, Forestville; son Jeff (Donna) Feuerstein, Sturgeon Bay; Mark (Teri) Feuerstein, Sturgeon Bay; Jay (Lori) Feuerstein, Sussex; grandsons, Jake, Nic, Joe, Ryan, Grant and Burke; great granddaughter Charlotte and great grandsons, Milo and Drake. Katherine will be remembered by her patients for her bedside manner. She was a great friend and neighbor, sharp dresser, thrifty shopper, skilled artist, great host and cook. She was active in many social, service and volunteer organizations including Philanthropic Education Opportunities (PEO), the Red Hatters, and the Door County Hospital Volunteers. She was also a reading buddy at St. John Bosco School and had also worked part time at Wilkins and Olander. She will be greatly missed by all. A memorial service will be conducted at the Forbes Funeral Home at 11:00 am on Wednesday, Oct. 22, 2025, with the Rev. Doug Leonhardt officiating. Friends may call at the funeral home on Wednesday from 9:30 am until the time of service. On-line condolences may be offered at forbesfuneralhome.com