PETROS, (Tennessee) - Maternal instinct remains strong, even if mom is 75 years old. Jesse Williams, 28, discovered that truism Thursday night when the mother of a man he allegedly was fighting shot him once in the leg to halt the assault on her son. According to Morgan County Sheriff's Office Chief Deputy William Angel, Williams broke into David Brandenburg's home at 905 Back Petros Road. The 43-year-old Brandenburg was home and began struggling with the intruder. The fighting men spilled out from the house and onto the yard, where Brandenburg's mother, Ruth Robbins, heard the commotion. Robbins lives next door to her son, Angel said. When Robbins tried to intervene, Williams allegedly assaulted her, Angel said. Robbins then shot Williams once in the leg near the groin area. Williams was taken by ambulance to a hospital after the 9:03 p.m. shooting where he was treated and then released. Authorities charged Williams with burglary, aggravated assault and simple assault, Angel said. Although Brandenburg sustained injuries from his battle with Williams, Brandenburg declined medical treatment. Angel said no charges will be filed against Robbins.