Jerry Hall vows to help sick twin sister.
Jerry, 42, rushed from America to Britain last week to help sister Terry find top specialists.
And she is putting her divorce to cheating Mick, 55, on hold while she helps Terry through chemotherapy treatment.
Jerry has vowed to buy the best treatment available - and is willing to face painful surgery to donate bone marrow.
Terry, who is the mother of two teenagers, first fell ill more than two years ago but doctors only told her she had breast cancer at the end of last year. She now faces surgery to see how far the cancer has spread.
Terry, who flew into London last Friday with her sister, was noticeably frail and was taken off the plane in a wheelchair. They had been on holiday in Aspen, Colorado.