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A third legal action against the city of San Diego over departing Mayor Bob Filner's alleged sexual harassment was brought Tuesday on behalf of a woman who accuses him of kissing her at an elementary school, her lawyer said.

A demand for $250,000 was lodged against the city by the lawyer representing the woman identified as Marilyn, who became Filner's 19th public accuser.

Gilleon said his client was introducing the mayor to students at Johnson Elementary School in Emerald Hills during a May visit when the alleged incident occurred.

"My client went up and told the teacher the mayor was here. She turned around and walked down the ramp, and he just grabs her and kisses her on the forehead; she was in shock," Gilleon said.

Filner also demanded her last name and took too long trying to remove an adhesive name tag from her chest, according to the lawyer, who said the mayor also put his hand around her waist and tried to walk her away.

"He's grabbing her by the waist, she's walking away. She's trying to pull away, he's pulling her back. That bodyguard should've been right there, saying, 'No, Mr. Mayor you can't do that,'" said Gilleon.

"He spends 4 to 5 seconds there supposedly trying to pull (the name tag) off. He's definitely touching her … not cupping, but inappropriate touching … what the witness said to me about it was, 'He knew exactly what he was doing,'" Gilleon added.

Parts of the incident were witnessed by another woman and a boy looking out the window, according to Gilleon. He said a member of the mayor's security detail was there at the time.

The city's response to the demand will determine whether he files a lawsuit on behalf of the woman, a 34-year employee of the state who is a secretary to a workers' compensation judge. She also serves as an advocate for domestic violence victims in the South Bay, he said.

Gilleon also represents Stacy McKenzie, the district manager for city-run Mission Bay Park, on whose behalf he filed a $500,000 claim on Monday, alleging the mayor battered the 50-year-old woman "for his own sexual gratification" and that the city failed to warn employees of his "predatory nature" and protect them from it.

McKenzie said Filner asked her out at a city function in April. She claimed the mayor put her in the so-called "Filner headlock" -- with his right arm rubbing along her chest -- in front of several people.

He said he is asking for less money for Marilyn because she is not a municipal employee.

The city has already been sued by Irene McCormack Jackson, Filner's former communications director, who alleges Filner told her she should work without her panties on, that he wanted to see her naked and that he could not wait to consummate their relationship.

McCormack Jackson -- the first of the 19 women to come forward -- also alleges Filner put his arm around her and dragged her along in a headlock while making sexual remarks.

It was mediation over the McCormack Jackson lawsuit that led the 70-year-old former congressman to resign after less than nine months in the mayor's office. He will officially step down at 5 p.m. Friday.

Gilleon said more women are continuing to come forward.

When asked how much these cases were worth and how much it would cost the city, Gilleon said the cost would be anywhere from $50,000 to $700,000, depending on the facts of the case.