i found this online...one of her many endings:
Unfortunately, Mary and her unborn child died in prison of fever. Anne, however gave birth to her child which was followed by several execution reprieves. This is where there are no more official records. She was not hanged and she did not die in prision. At the time of her trial she was not yet 20 years old. It is possible that her father was able to help her escape as well as continue the repreives, however nothing is known.
Here is one account of a possible 'Anne Bonny' who escaped prison:
"There is some conjecture that her wealthy father bought her release after the birth of the child. This is one version of her life after the trial. Anne's child, born five months after the trial, on April 21, 1721, was named John Cormac Bonny. John Rackham seems to have been listed as the illegitimate child's father. After the child's birth the mother and child return to Virginia via South Carolina. There are some records that imply that she married a Joseph Burleigh at this time, 1721. It is guessed that this marriage was arranged by Anne's father to get her started upon a clean slate when she returned (one can only imagine the dowry required to get a man to marry a woman reputed to be such a wildcat). The Anne thus recorded gave birth to eight more children with her husband, three of whom died young. This Anne is said to have died on April 25, 1782 (which would have put her age at somewhere around 70-80) and was buried in a place called Sweethaven (possibly in York County, Virginia)."