Mom outraged after teacher gives 14-year-old '50 Shades of Grey' to read in class

A Philadelphia mother who found the racy novel "Fifty Shades of Grey" in her son's backpack was upset, but when she found out where he obtained the book she was outraged.

Turns out the boy's teacher bought the book for independent reading time in class.

The teacher, Pillip Aidoo, works at the Eastern University Academy Charter School.

The mother, Mya Ladson, told the local NBC affiliate  “this was a 100-percent act of negligence. There should never be pornographic material purchased and distributed to a student by a school teacher.”

A school official reportedly said that the teacher bought the book with his own money, and "did not have an awareness" of its content.

The school agrees that the incident was a "serious mistake," but does not plan to fire the teacher.