The widower of country singer Tammy Wynette (“Stand By Your Man”) denied charges that he helped cause the country star’s death. George Richey and Wynette’s physician, Dr. Wallis Marsh of Pittsburgh, are being sued by three of her daughters for $50 million. “All of these allegations are totally false, without foundation, and that will be proven in a court of law,” Richey said. The daughters claim Richey and Marsh didn’t monitor their mother’s medical condition closely enough and gave her too many painkillers. Wynette died last April. She was 55. Marsh ruled she died of a blood clot to the lungs. There was no autopsy.