Sarah Ward and her partner Benn Smith spent a year trying for a baby unsuccessfully before Sarah finally became pregnant with Freddie, who was born in June 2013.
After their fertility problems in the past, the pair thought nothing of foregoing contraception after Freddie's birth, hoping to conceive again after another year.
But amazingly, a mere eight weeks after giving birth, Sarah discovered she was pregnant - this time, with triplets! The chances of naturally conceiving triplets is one in 8,000.
In March this year, Sarah gave birth to Stanley, Reggie and Daisy two months prematurely - leaving her with three fragile newborns and a nine-month-old to look after.
When they brought the surprise triplets home to their one-bedroom flat after seven weeks in hospital, the reality of having four babies hit home.
"There just wasn't enough space, and one basket was half in the walk-in wardrobe," postal worker Benn told the Daily Mail. "Sarah spent the first few weeks crying."
Seven months and a new three-bedroom house later, the couple have still barely had time to catch their breath. Every week, they get through an average of 175 nappies and 80 bottles of milk, their lives governed by a strict schedule of feeding and changing.
"Some nights we're so tired, not a word will pass between us. Benn will be lying on one sofa and I will be on the other and we'll just look at each other and smile before zoning out," Sarah admits.
"It's so full-on, we often don't have time to go to the loo, let alone eat, and one of us will suddenly say, as we're dropping off in front of the telly, 'Oh, we haven't eaten anything today.'"
Sarah and Benn agree that although life with four babies under 18 months is exhausting, they wouldn't change a thing. However, they won't be adding a fifth infant to the family any time soon. "I can't imagine life without them all," Sarah said, before adding: "But our family is definitely complete."