Megan O'Brien, 29, gave birth to Lilah and Josie, and sister, Sara Seyler, 32, had Lennon and Parker just three months later.br br The double pregnancies came as a shock to both women as twins do not run in the family at all.br br Although Megan's husband, Matt is a triplet, there was no indication Megan would give birth to twins, never mind her sister Sarah too.