Dedicated bridesmaid Lucy Morris walked her sister down the aisle – despite having been in labour for hours.
Primary school teacher Lucy, aged 29, woke in the early hours of the big day with contractions - but put on a brave face and didn’t tell bride Emma Rotherham.
Her cramps became more intense throughout the day, but she winced her way down the aisle and even posed for photos afterwards.
It was only at the reception her contractions became so painful she had to be taken to hospital, where she gave birth to baby Izzy.
Brave Lucy - who was a week overdue - said: “I wanted to watch my sister say ‘I do’ and I didn’t want to steal the limelight by giving birth.
“My due date was a week before the wedding so we always knew it was going to be close, but I never imagined I’d go into labour while walking down the aisle!
“I don’t know how I made it through the ceremony, I was in agony. I just kept praying my waters wouldn’t break before they exchanged their vows.”
Lucy was chief bridesmaid for her 26-year-old sister Emma’s wedding to Dan Bowker, 27.
The ceremony was held in front of 100 guests at Sacred Heart Church in Doncaster with the reception at the Holiday Inn in Doncaster.
Lucy, who is married to David, 29, and lives in Bradford, said: “I was halfway through my first mouthful of food at the reception when the contractions got deeper and longer. I was struggling to breathe.”
Her mother drove her to Doncaster Royal Infirmary and Izzy - now nine weeks old - was born 13 hours later after a long labour.
Emma, a hotel team leader, said: “This was only ever going to be a double celebration, not something taking shine away from the wedding.
“My day was perfect, and having my sister there to share the majority of it was all I could have hoped for.
“I love the fact Lucy left during the wedding breakfast to cheers. It was so exciting. We will share this special memory forever.”