HER long-distance marriage to Coldplay frontman Chris Martin seems to be taking its toll on Gwyneth Paltrow. The actress is currently filming in Nashville, while he is in London looking after their children. According to sources on the set of Love Dont Let Me Down, Gwyneth, 37, has been comfort eating and piling on the pounds. She has also been confiding in her co-star, country music singer Tim McGraw, 42. DM 'Gwyneth and Tim have become very close, says a source. Hes married to older than her, but hes a good sounding board. In recent weeks her macrobiotic diet has gone out of the window. But Gwyneths spokesman denied her time away filming was causing any problems. He said: 'She has been back in Nashville for only two-and-a-half weeks - she was in London for a week before that. Daily Mail