Jones told a coroner's court in Cardiff, Wales, on Monday that she only realized what had happened when she saw a foot in the toilet bowl.
She said she tried unsuccessfully to revive the baby and then put the body in the trunk of her car. The corpse was found in Jones' vehicle after she was arrested. She was given a suspended sentence for concealing the baby's birth.
The coroner's court is investigating the circumstances of the baby's death.
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