When the holiday season rolled around last year, Margaret Hecox knew exactly what her grandmother would love. The 23-year-old wrote in a card about "Heated Rivalry," the breakout Canadian TV series following a clandestine love story between two male hockey players. Heacox watched several episodes with her grandmother and also encouraged friends and other family members to tune in. "I knew she would like the show," Hecox said. "Obviously, she did." The grandmother-granddaughter duo is part of a