Is Bayley her maiden name? Did she marry John Barr? - you mention marriage in 1833, was that Ann Bayley to John Barr?
If so, she would have died as a Barr not a Bailey?
Child William Henry Bailey/Barr that you refer to presumably was illegitimate. You mention sister born 1828 - was she another illegitimate child of Ann Bayley? The sentence implies maybe she was a sister of Ann, rather than a sister of William.
Just noticed the possible death you mention was 1832, so before the date of the marriage .... So it cant be her marriage you refer to .
Can you tell us the source of the info you have already, and clarify it a bit! Thanks.