NEW YORK (AP) — Mayor Rudolph Giuliani has lost a round of his messy and highly public divorce from actress and TV personality Donna Hanover.

A judge ruled Monday that Giuliani's girlfriend, Judith Nathan, could not visit the official mayoral residence as long as Giuliani's children live there.

State Supreme Court Justice Judith Gische also rejected Giuliani's second attempt to obtain a gag order. She said she had no authority to stop either side from talking publicly, but added that "this does not preclude either of them from using good sense and personal restraint."

Adding to Giuliani's personal troubles, the mayor's 91-year-old mother, Helen, was reportedly taken by ambulance to Mount Sinai Medical Center on Monday evening after passing out at her home. The hospital refused to comment on her condition, but the New York Post and Daily News reported she was listed as stable.

The mayor and Hanover went separately to visit her, a heated exchange ensued, and a Giuliani aide asked Hanover to leave, according to the Post. She left after an hour and never got to see her mother-in-law, the Post reported.

Calls by The Associated Press to mayoral spokeswoman Sunny Mindel were not immediately returned Tuesday.

Giuliani and Hanover continue to live at Gracie Mansion with their children, Andrew, 15, and Caroline, 11. Hanover sleeps in the master bedroom of the 200-year-old, four-story residence, and the mayor sleeps in a guest room.

Gische said that if Nathan remains in Giuliani's life, it is inevitable that she and the children will meet. The judge gave Giuliani and Hanover 30 days to come up with an agreement on how the children and Nathan will be introduced.

"Donna is grateful for the court's decision to put the children's well-being first," said Hanover's lawyer, Helene Brezinsky.

Giuliani's lawyer, Raoul Felder, said Giuliani was gratified that the judge is providing "an opportunity to introduce his children to a person who shares and will share a great part of his life."

The mayor refused to comment.

Gische said Giuliani's reasons for wanting Nathan to visit the mansion are "strictly personal" and "there is no public or governmental interest served" by Nathan's presence at the mansion.

Felder had argued that the mansion — at least parts of it — were public, that Nathan had as much right to be there as anyone else.

Nathan has shown up at several public events with the mayor, including parades and receptions at the East Side mansion. The judge said Nathan and the mayor's daughter had a "near miss" in the mansion April 27. The mayor said the close call was staged by Hanover.

Giuliani, who has been seeing the 46-year-old Nathan for about two years, calls their relationship "adult" and "mature" and credits her with helping him deal with his prostate cancer, which was diagnosed last year.

Giuliani will leave office at the end of the year because of term limits.