Samantha Lamb, 41, of Ivybridge, England, said she and Andy, 45, married in 2007 and she gave him a kidney a few years later when he became ill and needed a transplant, the Mirror's Sunday People tabloid reported.
Lamb said the marriage broke apart a few years later when she suspected he was having an affair with her friend and the other woman admitted to the infidelity.
"I can't believe he now has a second chance to live to see his grandchildren grow up," Lamb said. "I would definitely go through the operation again -- but I wouldn't give the kidney to him. I hate him. If I could I'd take it back and give it someone else. Obviously I don't want people to be put off putting their names on the organ donor list. But all I want from him is his name on the divorce papers."
Andy Lamb said he was never unfaithful to Samantha.
"I did walk out on Samantha after she'd donated her kidney, but I wasn't unfaithful," he said. "I never wanted her to donate her kidney because it was a big risk. But she insisted and I'll always owe her my life.
"I loved her but our relationship wasn't working. We had big rows and her family never liked me," he said. "Despite what Samantha believes, I've never been with her friend. I just helped train her dog."