Mary Dell Templeton prefers the quiet charms of Too Much, Texas to the bright lights of Dallas any day. She's relieved to be moving back to her hometown-and bringing her cable TV show, Quintessential Quilting, with her. There are just a couple of wrinkles in her plan. Her son, Howard, who is her talented cohost and color consultant, and who happens to have Down syndrome, wants to stay in Dallas and become more independent. Meanwhile, Mary Dell's new...