"I told Maruschke to go and buy a birthday cake, and we will put it in front of [Dianthe] and just let her go," Mr Barnard said.
Dianthe does not seem overly affected by the ongoing shocks, but her parents have noticed that she seems to have a knack for predicting them.
"She normally cries really bad right before a big one," Mrs Barnard said.
The Barnards are expecting a sister for Dianthe in about a month.
Mr Barnard: "The guys at work were saying if Maruschke goes into labour, I must let them know because they want to get out of Christchurch - they don't want [to be in] another earthquake."
Mrs Barnard was at home on Christchurch's Port Hills with her father and Dianthe when the deadly February 22 quake struck, and was terrified.
"When I got home [the house] was just a mess. I couldn't believe Maruschke and her dad and Dianthe made it out of the house," Mr Barnard said.
The family were forced out of their damaged rental home after more big shakes on June 13, and are now living with Mrs Barnard's parents in the Canterbury township of Darfield. They did not even feel a 4.9-magnitude shock early yesterday.
They had considered leaving Canterbury, but are staying put for now. But another big quake might change their minds - "I don't want to stay here and maybe lose Maruschke or Dianthe," Mr Barnard said.