FILE - Britain's Prince Harry and Meghan, Duchess of Sussex, pose with their newborn son Archie Harrison Mountbatten-Windsor in St George's Hall at Windsor Castle, Windsor, south England, on May 8, 2019. It won't be long before Archie is a big brother. His mother is due to give birth to a baby girl sometime this summer. Hopefully, the introduction of the new sibling will go smoothly, but seasoned parents and pediatric experts warn that the transition takes preparation and diligence. (Dominic Lipinski/Pool via AP, File)

This photo shows Caitrin O’Sullivan Boury, 36, left, with her husband, AJ, 35, and their four children, from left to right, Sullivan, Declyn, 5, Drew, 4, and Felicity, 2, on the steps of their home in Red Bank, N.J. on May 2, 2021. Caitrin faced challenges introducing her kids to her youngest, who was born during the pandemic. (Anne O’Sullivan via AP).