"We wanted to try for a girl and ended up getting two. We're very excited," she told news.com.au.
"I think things will be easier this time around, because we are just more prepared and experienced," she said.
"We're pretty organised about it and we've learned from juggling the first two kids, so we're not too worried."
Like many mothers, Sophia struggled with breastfeeding. This time around, she wants to avoid that stress.
"We're not breastfeeding this lot," she said.
"I tried with the boys and I ended up in hospital with mastitis, so we went straight to formula with the girls. And already last night they slept pretty well.
"At the end of the day, fed is best. My boys are perfectly healthy and thriving."
Sophia and Paule work part-time in the public service and have the support of Sophia's family, so don't need to pay for childcare.
The couple are ecstatic with their "perfect family" - but not everyone is so positive.
"Everyday we get so many comments, things like 'I feel sorry for you' or 'I'd hate to be you'. It's a bit offensive," Sophia said.
"We just focus on the positive. We have healthy children. Some people say it's their dream to have this and it really is our dream. So it's nice to have the perfect family - two boys and two girls."
Last year, Brisbane couple Simone and John Burstow welcomed their second set of naturally conceived, identical twins, Evie and Georgia.
They were already parents to then 4-year-old twins Oliver and Harrison.
Simone found out she was expecting twins at the six-week scan.
"I thought something was wrong because my obstetrician's face changed and he looked really shocked. I asked what was wrong and he found the second heartbeat, I was completely dumbstruck," she told Kidspot.
"I was laughing and crying at the same time, asking him how does this happen? Then I had to call my husband to tell him. He was really shocked too but so excited!"
Simone said two sets of twins is more than enough for her and John to handle.
"We have loved watching the bond and relationship between the boys over the last four years and to know that our girls will grow up together is so special," she said.
"The boys have been so beautiful with the girls. They are fascinated by them," Simone said. "They read stories to the girls while they are feeding and they love watching them have a bath and get dressed.
"At this stage, I can't see us having any more babies. We feel like the luckiest parents in the world to be blessed with four beautiful, healthy children and feel that our family is complete. Plus we are running out of room in our house and car."
