LOS ANGELES (Reuters) – The mother of "Modern Family" star Ariel Winter on Wednesday denied that she abused her daughter after a judge temporarily placed the 14-year-old actress in her sister's care. "It's all untrue, it's all untrue," Chris Workman, Winter's mother, told People magazine. "I have my doctor's letter that my daughter's never been abused." According to court papers, a Los Angeles Superior Court judge last month put Winter, who plays the precocious teenager Alex Dunphy on the Emmy-winning TV comedy, under the temporary guardianship of her older sister, Shanelle Gray. …