At the height of a heated in-vehicle argument, a Sutherlin mother of four shut off the engine, pocketed the keys and ran away, leaving her ex-husband and four children in a pickup blocking traffic at a busy north Roseburg intersection, police said. At 7:45 p.m. Friday, police say the 36-year old woman was stopped in the left-turn lane of Northwest Stewart Parkway at Edenbower Avenue when a verbal dispute reached a heated climax. She abandoned the pickup and headed north on foot. “Basically, she parked that vehicle in the middle of a busy street,” police Sgt. Jeff Eichenbusch said. According …