A twisted female teaching assistant who sexually assaulted a 12-year-old boy just yards away from his friends has been jailed. Anna Marie Crocker, 34, has been jailed for more than 51 years after also sexually assaulting a 14-year-old boy in a car park. The mum-of-four groomed the boy on Snapchat before she carried out the assault, court records show. Crocker was also accused of exchanging sexual messages with a 13-year-old and 16-year-old boy. The teaching assistant asked the older teen to