Story highlights "I can forgive anybody but he needs to step down," Peggy Shannon says

She works at the Senior Citizens Service Desk at City Hall

15 other women have previously come forward

Filner has acknowledged failure "to fully respect" some women, but says he'll be vindicated

The latest person to accuse San Diego Mayor Bob Filner of sexual harassment is a great-grandmother.

Peggy Shannon, 67, who works at the Senior Citizens Service Desk in San Diego City Hall, allegedly faced "continuous inappropriate sexual advances by the mayor while trying to do her job," according to the office of her attorney, Gloria Allred.

Shannon said the mayor kissed her and once asked "me if I thought he could go eight hours in one night."

"Every day that I went to work, I had butterflies in my stomach because I did not know what was going to happen the next time the mayor came by my desk," Shannon told reporters Thursday.

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Photos: Photos: San Diego mayor's accusers Photos: Photos: San Diego mayor's accusers San Diego mayor's accusers – Businesswoman Dianne York told CNN that San Diego Mayor Bob Filner put his hands on her buttocks during this photo op after a meeting three months ago. York said there were witnesses. She said both her advisers and Filner's were in the room at the time. Click through the gallery of other women who have come forward in the case. Hide Caption 1 of 17 Photos: Photos: San Diego mayor's accusers San Diego mayor's accusers – Caryl Iseman , a San Diego real estate agent, attended an anti-Filner rally in August. She told CNN iReporter Chris Morrow that at a fundraiser 25 years ago, after photos had been taken, Filner "decided he could reach around and grab my breast." Iseman indicated it was the first time she had spoken publicly about the alleged incident. "The sheriff's department knows about it. I have not yet come forward yet with it ... but if it's needed to establish the timeline of how long this guy has been doing this, I will." Hide Caption 2 of 17 Photos: Photos: San Diego mayor's accusers San Diego mayor's accusers – Peggy Shannon, a 67-year-old great-grandmother who works at the Senior Citizens Service Desk in San Diego City Hall, faced "continuous inappropriate sexual advances by Filner while trying to do her job," according to the office of her attorney, Gloria Allred. Hide Caption 3 of 17 Photos: Photos: San Diego mayor's accusers San Diego mayor's accusers – Kathryn Vaughn, a San Diego attorney, told CNN affiliate KFMB that after her husband walked away at a public event 10 years ago, Filner "made an inappropriate movement on my body." Hide Caption 4 of 17 Photos: Photos: San Diego mayor's accusers San Diego mayor's accusers – Eldonna Fernandez says Filner left her a flirtatious e-mail after they met at a Healing and Hiring Fair held by the National Women's Veterans Association of America in 2012. "Hi, it's your newly favorite congressman, Bob Filner. You know, the one who fell in love with you at your last speech," Filner said in the voicemail. Filner, 70, has been dogged for weeks by sexual harassment allegations. He has refused to resign. Hide Caption 5 of 17 Photos: Photos: San Diego mayor's accusers San Diego mayor's accusers – Army veteran Gerri Tindley says Filner got too close to her at a National Women's Veterans Association of America event where she gave a speech about being raped, which she said happened during her eight years of service. Tindley said she felt uncomfortable as Filner moved closer and closer -- so close, she said, that she nearly fell off the couch trying to move away from him. Hide Caption 6 of 17 Photos: Photos: San Diego mayor's accusers San Diego mayor's accusers – Michelle Tyler, center, has accused Filner of unwanted sexual advances . During a news conference, Tyler said that during a visit to his office in June, Filner rubbed her arm and asked for dinner dates in exchange for his helping Katherine Ragazzino, right, a brain-injured Iraq war veteran. Hide Caption 7 of 17 Photos: Photos: San Diego mayor's accusers San Diego mayor's accusers – Renee Estill-Sombright told CNN affiliate KGTV that the mayor called her "beautiful" at a church breakfast in June, said he couldn't take his eyes off her, asked whether she was married and then said he'd like to take her out some time. Hide Caption 8 of 17 Photos: Photos: San Diego mayor's accusers San Diego mayor's accusers – Emily Gilbert accused Filner of sexual harassment on Friday, August 2. She told CNN she was hired to sing at a fundraising event in December and the mayor grabbed her, slid his hand down the small of her back and gave her "tush a pat." He then asked her: "Oh, Marilyn, can I get your card?" she recalled. Hide Caption 9 of 17 Photos: Photos: San Diego mayor's accusers San Diego mayor's accusers – Filner's former spokeswoman, Irene McCormack Jackson, has also accused him of sexual harassment and filed a suit against him. She said Filner subjected her and other women to "crude and disgusting" comments and inappropriate touching. She resigned as Filner's communications director in June after, she said, she decided the mayor would not change his behavior. Hide Caption 10 of 17 Photos: Photos: San Diego mayor's accusers San Diego mayor's accusers – Nonprofit founder Morgan Rose said she met Filner in 2009 when she was lobbying for her organization, which works with military and other families hurt by domestic violence. She says he looked her up and down, stared into her eyes and said, "Your eyes have bewitched me." He then moved to her side of the booth, sat beside her, pinned her to the wall, and put his arm around her, Rose alleged. Hide Caption 11 of 17 Photos: Photos: San Diego mayor's accusers San Diego mayor's accusers – Political consultant Laura Fink has accused the mayor of patting her "posterior" at a fundraising event in 2005. At the time, Fink was working as the deputy manager of Filner's congressional campaign. She said she thinks Filner should resign. Hide Caption 12 of 17 Photos: Photos: San Diego mayor's accusers San Diego mayor's accusers – Sharon Bernie-Cloward, president of the San Diego Port Tenants Association, claims that when Filner was running for mayor in 2012, he approached her at a political event. "He touched me, actually groped me on my backside inappropriately," she told KPBS. "I was left there startled and fearful. In fact, I actually had someone walk me to my car that night." Hide Caption 13 of 17 Photos: Photos: San Diego mayor's accusers San Diego mayor's accusers – Patti Roscoe, a prominent businesswoman in San Diego's tourism and hospitality industry, told KPBS that on numerous occasions, Filner "put me in what I guess now is the famous headlock." She told the station: "I felt fearful, even as well as I knew him, because it was an invasion into my space. And he would come in and try to kiss me on the lips, and I'd have to squirm to get away." Hide Caption 14 of 17 Photos: Photos: San Diego mayor's accusers San Diego mayor's accusers – Veronica "Ronne" Froman, a retired Navy rear admiral and San Diego's former chief operating officer, told KPBS that she and Filner, then a congressman, met a few years ago at his office after everyone had left. "He stopped me and he got very close to me. And he ran his finger up my cheek like this, and he whispered to me, 'Do you have a man in your life?' " she said. Hide Caption 15 of 17 Photos: Photos: San Diego mayor's accusers San Diego mayor's accusers – Joyce Gattas, a dean at San Diego State University, told KPBS that she had several "interactions" with Filner "where he's held me too tight, a kiss on the cheek which is inappropriate, hands on the knee that last too long." Hide Caption 16 of 17 Photos: Photos: San Diego mayor's accusers San Diego mayor's accusers – Lisa Curtin, the director of government and military education at San Diego City College, told KPBS that Filner grabbed her hand, fingered her wedding ring and asked if it was real. She also said he tried to kiss her; she moved her head and felt his tongue on her cheek. Hide Caption 17 of 17

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Photos: San Diego's scandalous past Photos: San Diego's scandalous past San Diego's scandalous past – The sexual harassment allegations against San Diego Mayor Bob Filner are not the first time this Pacific Coast city has seen scandal. Look back at some of the other political missteps, morasses and quagmires in which the city's politicians have found themselves: Hide Caption 1 of 12 Photos: San Diego's scandalous past City Hall has never been cheaper – San Diego's first mayor, Joshua Bean, reportedly sold City Hall and the land it sat on to himself and a drinking buddy for $2.50. He eventually deeded the property back to the city after a lawsuit and later resigned as mayor over a pay dispute. He was mayor from 1850 to 1851. Hide Caption 2 of 12 Photos: San Diego's scandalous past Oil scheme runs dry – Louis J. Wilde, who became mayor in 1917, ran a scheme where he encouraged residents to invest in $100 stock shares of the Community Oil company, which would drill for crude in the area. But the drilling never made good, and Wilde reportedly took in far more cash than he spent on the search, lining his pockets and leaving his investors as dry as the oil wells. He did not seek re-election. Hide Caption 3 of 12 Photos: San Diego's scandalous past Felony hit-and-run – Rutherford Irones, whose mayoral term only lasted six months, was convicted in 1935 of felony hit-and-run driving. He was driving a city-provided car while drunk and struck a car. Irones fled the scene, leaving the two people in the car he struck injured and without medical attention. He resigned as mayor and later served a six-month jail sentence. Hide Caption 4 of 12 Photos: San Diego's scandalous past Taxi scandal puts brakes on career – Frank Curran, who was mayor from 1963 to 1971, was indicted in 1970 after being accused of taking bribes from the Yellow Cab company to clear a taxi rate hike. A Superior Court jury cleared him of the charges, but his career never recovered. Hide Caption 5 of 12 Photos: San Diego's scandalous past Council no-show had to go – Jess Haro was appointed to fill an empty seat on the City Council, later winning an election. In 1978, he served 90 days for misdemeanor customs fraud resulting from the failure to report the true value of items he imported from Mexico. After he hit the city charter's limit of eight missed council meetings in a row, he was removed from office. Hide Caption 6 of 12 Photos: San Diego's scandalous past Caught up in campaign financing – Roger Hedgecock was elected as mayor in 1983 and resigned in 1986 over charges that he accepted illegal campaign donations and covered them up. The California Supreme Court threw out 12 felony perjury counts against him. He did plead guilty to one felony, which was later reduced to a misdemeanor and eventually expunged from his record. He is now a radio talk show host. Hide Caption 7 of 12 Photos: San Diego's scandalous past A harassment case hush-hushed – Robert Spaulding, the city planning director, and Susan Bray, a planner who worked for him, were involved in a two-and-a-half year sexual relationship that ended in 1991. Bray filled a sexual harassment complaint against Spaulding saying she only participated because she feared for her job. A hush-hush settlement was arranged in such a way that the City Council wouldn't be informed. The whole thing eventually came out, forcing Spaulding to resign and costing the city more money to clean up the mess. Hide Caption 8 of 12 Photos: San Diego's scandalous past The city will pick up that tab – Councilman Uvaldo Martinez resigned in 1986 after allegations that he used his city-issued credit card to treat himself and his friends to meals and drinks, claiming it was city business. He reimbursed the city just over $600 as part of his plea bargain, in addition to going on probation and performing community service. Hide Caption 9 of 12 Photos: San Diego's scandalous past Foul called in ballpark vote – Valerie Stallings stepped down from the City Council in 2001 after pleading guilty to misdemeanor charges. She was accused of accepting gifts from Padres owner John Moores while voting in favor of the downtown ballpark. Stalling maintains she did nothing wrong. Construction on the ballpark was halted while the charges were investigated by a federal grand jury. Hide Caption 10 of 12 Photos: San Diego's scandalous past Pinched in pension program – Dick Murphy was elected to two terms as San Diego's mayor starting in 2000. He resigned in 2005, only seven months into his second term, under accusations of financial mismanagement surrounding the city's pension program and after credit-rating agencies cutting the city's ability to borrow money. In addition, Time magazine named him one of the worst mayors in the country. His second run for mayor also sparked controversy, as thousands of write-in votes for his main competitor, Donna Frye, were disqualified over a technicality. Hide Caption 11 of 12 Photos: San Diego's scandalous past Stripped from office – Three days after Murphy resigned, two city councilmen, including then-acting mayor Michael Zucchet, were convicted of conspiracy, extortion and fraud. Zucchet, left, and Ralph Inzunza were convicted for taking campaign contributions in exchange for pushing the repeal of a city regulation that banned strip-club dancers from touching patrons. A third councilman, Charles Lewis, was also indicted, but he died before he could be brought to court. The regulation still stands, and there was never a vote on whether it should be repealed. Hide Caption 12 of 12

"I have three sons, four grandsons and two great grandsons. As our mayor, you should be -- but are not -- a role model for any of them," she said.

Later, Shannon spoke to CNN's "Piers Morgan Live," and called for the mayor's resignation.

"I can forgive anybody but he needs to step down," she said. "People are surprised that as a great-grandmother that this happened to me -- so it could happen to anybody else."

is the 16th woman to come forward with such allegations, Shannonis the 16th woman to come forward with such allegations, according to CNN affiliate KFMB

Filner's office has not responded to multiple CNN requests for comment on the allegations.

As the list grows, city officials said Thursday that Filner might be booted from office later this month over a different, but related issue: money.

'Inappropriate movement on my body'

A local attorney became the 15th accuser against Filner, speaking to KFMB this week.

Kathryn Vaughn told the station that after her husband walked away at a public event 10 years ago, Filner "made an inappropriate movement on my body."

Filner, 70, was elected mayor of the eighth-largest American city in 2012, after 10 terms in Congress. His accusers range from a singer at a campaign fundraiser to his former communications director, who called him unfit for office.

He has rebuffed calls to resign from all nine City Council members and from fellow Democrats, including California's two U.S. senators. He now faces a recall effort that is trying to gather more than 100,000 signatures needed to put his future up to a new vote, though some political observers doubt organizers can succeed.

In July, Filner acknowledged that he "failed to fully respect the women who work for me and with me" and that he was "embarrassed" by his actions. But he also said he would be vindicated by "a full presentation of the facts" and he would not resign.

Mayor could be booted over money

Now, investigators are also looking into possible financial impropriety -- including questionable charges at the Westgate Hotel, where Filner allegedly took women.

The San Diego's City Attorney's Office told CNN Thursday that it had found the charges were inappropriate. Filner's attorney and the mayor's office did not respond to CNN's requests for comment Thursday.

The city attorney's office said a rarely used section of the city charter, Section 108, dating back to 1931, would allow for Filner to be removed from office -- without a recall -- over unauthorized payments from the city treasury.

The city council plans to vote August 28 on whether to invoke that section. If it does, it would then ask a court to boot Filner from office.

Kevin Faulconer, a Republican who sits on the council's audit committee, raised questions about other charges as well.

He alleged that Filner charged hundreds of dollars in personal expenses and threatened the city's credit by failing to pay the bill. The mayor's city credit card was stopped in July, Faulconer's office said.

"Mayor Filner's continued abuse of power knows no bounds," the councilman said in a statement. "Based on this new evidence, I am broadening the scope of my Audit Committee hearing to investigate how Mayor Filner was able to circumvent credit card rules and how to prevent negative effects on the City's credit rating as a result of one person's misuse of taxpayer dollars."