My former coworker's step daughter had a baby at age 11. She had been living with her mother and had little supervision. She went to a party with older kids, got drunk passed out and was taken advantage of by 3 boys at the party. (I'm not sure just what happened to the boys envolved.)
It was a tough situation for her and a hard lesson learned.
Luckily she and her baby now live with her father and step mother in a more secure and loving environment and has help from family in raising her baby. .