Arefugee family who scored a $4million lotto windfall after fleeing worn-torn Africa will use their winnings to work less and spend more time with their children.

Aristide Nininahazwe and his wife Esther Mboneye won a $3million house in Adelaide's beachside suburb of Henley Beach plus $1million in cash in June after buying a ticket in The Hospital Research Foundation Home Lottery.

August 17 was a major milestone for the couple, who fled to Australia from Burundi in East Africa to escape the civil war.

The same day they finished moving into their luxurious four-bedroom home, they welcomed their second child, a baby named Cairo.

'When you become a millionaire overnight, you have so much going on in your mind,' Mr Nininahazwe, who goes by the nickname Brian, told Daily Mail Australia.

Ms Mboneye added: 'Every time I would go to sleep I kept on having nightmares... Like someone was going to come and knock on the door and say they made a mistake.

'We feel very privileged and lucky to be in this position, because not everybody gets this chance, so it is very overwhelming. 'It's everyone's dream. It's a dream come true.'

Mr Nininahazwe said it was hard to explain how the family's life has changed in the past few months, saying it was 'wonderful and scary at the same time'.

The couple, who are both employed in the healthcare industry, are now planning to use their jackpot to create a better work-life balance, by taking an additional day off each week or fortnight to spend time with their family.