Christie Brinkley is hoping her ex won’t allow their kids to watch a TV interview in which he apparently explains his affair with a teenager and his Internet porn proclivities - and she’s making it a legal matter.

She had her lawyer unsure that her former husband- Peter Cook - will keep the couple’s two children away from the Barbara Walters interview scheduled to air on ABC while he has custody of them this weekend.

“His parenting has to be away from his home and he can’t expose them to the `20/20′ broadcast” airing Friday night, Cohen said.

Cook settled the highly public and nasty divorce this past summer after a week long trial that featured salacious testimony about his affair with a teenager and his use of Internet porn.

He explains those allegations in the interview.

This was Brinkley’s fourth marriage and Cook’s first.

*alexis