Ann Ostilow is the mother of molestation victim Jeremy Ostilow, Jr.. "J.J." was molested by her husband Jeremy Sr.'s boss, Billy Tripley, agreeing to an NDA and a payoff so Tripley wouldn't be reported.
When "J.J." pulled an outrageous prank online, lying about raping his sister and being ready to kill cops in a horror chat room, he was hospitalized until the squad could sort out his case. Finding out he was molested, Jeremy Sr. and Ann put up legal stonewalling to keep the detectives from reaching J.J. Tripley was acquitted, and J.J. was smuggled out of the state to flee the justice system.
Ann's status after her criminal accessory and conspiracy is unknown. (SVU: "Sick")