TRENTON - A teacher at a central New Jersey prison is accused of sexually assaulting an inmate more than 20 times and becoming pregnant twice.

Mercer County prosecutors say 42-year-old Chong-Hwa Chang of Delran taught at New Jersey State Prison in Trenton and had a sexual relationship with an inmate. reports the Corrections Department found a journal in Chang's home, in which prosecutors say she admitted to having a sexual relationship with the inmate and getting pregnant twice.

Sexually explicit photos of Chang were also found during the search.

Chang's bail was set at $50,000 on Thursday. It isn't immediately known if she has a lawyer.