Meara,
Susan Tighe died unmarried in 1893 in Broxburn at age 28. Her death record does not note her parents, John and Mary Jane Mullen as being deceased. Margaret Tighe married Peter Floody in the Broxburn Catholic Church on June 29, 1888.
I can't account for John, his wife Mary Jane, their children Patrick and Elizabeth nor Margaret and her husband Peter Floody.
What makes you think/suspect they went to Chile?
John