Prince Charles and Princess Diana's 7-year-old marriage is going through another rocky patch, and Charles is being "comforted" by a married girlfriend while Diana stays at home with the children, British newspapers said Sunday. Charles's absence from Diana and their sons, William and Harry, during the Easter holidays "has sparked off fresh speculation that there are still problems with their increasingly long-distance marriage," according to the Sunday Mirror front-page story. "Senior members of the royal family fear that the gap will widen unless the stubborn pair agree to compromise on their separate lifestyles," it said.