Complex sentence: Kitty has married the wealthy Lord Lasswade as her mother predicted, and Milly has married Edward's friend Gibbs; they are at a hunting party at the Lasswade estate.
Split into simpler sentences: Kitty has married the wealthy Lord Lasswade, as her mother predicted, and Milly has married Edward's friend Gibbs. They are at a hunting party at the Lasswade estate.