depends on the denomination my grandmother was of a fundamentalist denomination absolutely against divorce... when she was “save” in the early 1920’s ..she was married to her 2nt husband at the time and had two children by him when she was “saved”..
She decided she was an adultery... left her second husband taking the children from her first and second marriage ..the children from the second she then considered illegitimate and said so
She then living as a single woman with 5 kids during the Depression in profound poverty ...caused a lot of friction in the family about Church in the family for years.
Children of a “natural” marriage are always legitimate. Children whose parents’ marriage is annulled are always legitimate.
I child is considered illegitimate if the mother and father aren’t married, at least civilly.
Wow! What a story about putting faith and God first in your life.