Maiden Stone I have a similar situation in the late 18th century, the woman I believe to have been my 3xgreat grandmother had numerous illegitimate children and claimed for none of them on the parish. Perhaps that was her occupation and also why noone with my surname seems to match my DBS before her son.
This thought has crossed my mind more than once.
I checked the date of a removal order for Barbara when she was "a Singlewoman, great with child and poor" and realised it was 3 years before the baptism and death of her daughter, Catherine. The removal order was set aside a few months later. Explanations may be: 1833 pregnancy ended in miscarriage or neo-natal death; the baby was palmed off to someone else; one of the sons born to her parents in 1833 or 1834 was hers; Catherine was not a baby when she was baptised.

Barbara was not my direct ancestor. That was one of her younger sisters who also had an illegitimate child when she was 18. However he was the son of her future husband, named on birth certificate. Another sister had an illegitimate son in summer 1841. Baptism register has her father's name as the child's name which had me confused again.

She married a few years later, possibly to the real father of her son. That baby was too late for 1841 census, otherwise there would have been 2 babies and a toddler in the household as well as Barbara's 10 year-old son.
The parish church baptism register didn't note that babies were illegitimate.