The Connecticut stepmom accused of imprisoning her stepson in a foul bedroom for two decades is back in court to argue his secret identity should be revealed — a motion that his biological mother called “appalling.”

Kimberly Sullivan , 57, is due in a Waterbury court Friday to fight prosecutors’ request to keep her 32-year-old stepson’s newly assumed identity hidden from her and the public, which the state argued was necessary for his own safety.

But Sullivan doesn’t buy the state’s argument — and thinks she has the right to confront the man accusing her of locking him in a storage closet for 22 hours a day since he was 11.

“The state’s position, stripped of its appeal to ‘victim’ protection, amounts to this: the accuser may assume a new identity, relocate to an undisclosed address

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