One bonus has turned into a much bigger one for a Christchurch couple now $624,922 richer.
The couple had won a bonus ticket of a free line of Strike with a Lotto ticket bought in November - and it turned out to carry the lucky numbers in Saturday night's draw.
The woman who purchased the original ticket, and who wished to remain anonymous, found out she'd won when her husband checked their ticket in bed just before turning in for the night.
"He'd written down all the winning numbers and was in bed checking them off on our ticket when all of a sudden he just sprang out of bed and said 'Oh my God'," said the winner.
"I just replied, 'Oooh, we haven't won Lotto have we?' I thought we might have won $400 if we were lucky.