"Every day I ring repeatedly and regularly and hope that he will answer.
"Yesterday he answered the phone and let me talk to the older girls for a minute and I was trying to ask them where they were but he obviously had the phone on speaker and snatched it off them."
She said the girls did not say much.
"They just said hello and that they love me."
Mrs Smith, a 35-year-old account administrator, suspected her husband may have taken the girls to Brisbane, where he had other relatives.
Earlier this week, a Victoria Police spokeswoman confirmed the children's names were on the missing persons list and police were looking for them.
However, today a spokeswoman said the authority was unable to comment on the matter while it was before the Family Court.
While the girls have been missing, Mrs Smith has missed two of their birthdays and was dreading the possibility of Christmas without them.
"It is really just unfair and now I am dreading, 'oh my gosh am I going to get them back before Christmas?' I am starting to think of that because it has already been a long amount of time."