She explained to Britain's HELLO! magazine: "One of our favourite tracks, Distress, came on. It's a rousing emotive mass sung in Latin and as we played it, his EEG machine, which measures electrical activity in the brain, went mad.
"For us, this was a sure sign that he was responding. So I lifted up one of his headphones and asked, 'Robin, can you hear the music?'
"That's when his eyelids flickers and he looked at me. I couldn't believe it."
Doctors were also shocked when Robin awoke as they had warned his family to expect the worst.
Dwina said: "The doctors were astounded. They kept shaking their heads in disbelief. They'd tried everything in their power to bring Robin back and when it didn't work their prognosis was bleak.
"They didn't think he was going to make it and warned us to prepare for the worst."
- Bang! Showbiz