Even if a teen pregnancy was covered up and her mother or other relative "claimed" the baby.
Another thread got me thinking. My Dad has a 20 year gap between his and his next youngest brother. His mother would have been late 40s when he was born.
He also spent some time living with his brother and young wife as a child (but not a baby).
Dad never seems to have wondered about his parentage - he went to stay with his brother because mum was unwell.
I'm wondering how they covered things up when people took on babies born out of wedlock?