Complex sentence: The couple's "proper" honeymoon was delayed until the following summer by Theodore's acceptance into Columbia Law School and after two weeks at the family home in Oyster Bay the couple went to live with Theodore's widowed mother, Martha Stewart "Mittie" Bulloch.
Split into simpler sentences: The couple's "proper" honeymoon was delayed until the following summer due to her new husband's acceptance into Columbia Law School. After spending the first two weeks of their marriage at the Roosevelt family home in Oyster Bay, the couple went to live with Theodore's widowed mother, Martha Stewart "Mittie" Bulloch.