She’s not a Catholic and has never been a Catholic. She has made many remarks about her disdain for religion, unless it’s some leftist nutcase religion.
She stopped singing that song, or line because she doesn’t believe that any more.
She was Christian for a while, and probably still is, but liberal.
In the 60’s when she was young, she was unmarried and pregnant. She did not have an abortion but gave the baby up for adoption.