When my mother came back from the island, she came back as a newborn Christian. [...] was shocked, especially since none of them belonged to that religion.
(In this case, they refer to the mother's parents/brothers/sisters, and also the husband's parents/brothers/sisters. Not the husband because he was dead. And not the speaker because he was still a baby. So there's no immediate family.)
What would a native English speaker use in cases like this? Her family, my family, our family, or my relatives?