Complex sentence: Born into a lower-middle class family, she was a well-known "party girl" in the faster Irish circles before marrying Galen Weston in 1966; they have two children, Galen Jr. and Alannah.
Split into simpler sentences: Born into a lower-middle class family, she was a well-known "party girl" in the faster Irish circles before marrying Galen Weston in 1966. She and Galen Weston have two children, Galen Jr. and Alannah.