The 62-year-old, who lost his battle against liver and colon cancer in May, went against doctors' advice to have his cancerous cells properly checked, reported Contactmusic.
The cells were initially spotted after the 'How Deep is Your Love' singer had an operation to remove an intestinal blockage in October 2010, but he ignored it to continue writing and performing.
"He didn't want to stop and I said, 'Please just have the scan.' Despite all his wonderful ways, Robin could be very stubborn and he never liked bad news - he just didn't want to know. He went to do a show in New Zealand as they'd just experienced an earthquake. Maybe it was very important for him to do that show, but it was still important for him to have his scans," Dwina said.
Gibb toured for over two weeks in November 2010 and Dwina says when he finally did have a check up, the cancer had developed to a secondary stage.
