Casting her mind back to the moment they realized they'd won a second major prize, Charlene said: "I couldn't believe it, I still can't believe it. We just kind of looked at each other. The ticket has been in my purse and with me the whole time. It is just as exciting as the first time."
The Gulkas are now hoping to do it again and win another big prize.
"We want to go for a hat-trick," Charlene said.