Rose spoke of the incident to her closest friends and didn't pursue the matter because she feared her nonprofit might somehow suffer, she told CNN.
But when Rose heard of similar accusations against Filner in recent weeks, she called the victims hotline.
• Sharon Bernie-Cloward
Sharon Bernie-Cloward, president of the San Diego Port Tenants Association, relayed her allegations against Filner to KPBS, along with three other accusers. She said 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," Bernie-Cloward told KPBS. "I was left there startled and fearful. In fact, I actually had someone walk me to my car that night."
• Patti Roscoe
Patti Roscoe, a prominent businesswoman in San Diego's tourism and hospitality industry, told KPBS that on numerous occasions, Filner "put in me what I guess now is the famous headlock."
"I felt fearful, even as well as I knew him, because it was an invasion into my space," Roscoe told the network. "And he would come in and try to kiss me on the lips and I'd have to squirm to get away. And just as recently as a few months ago this happened. I turned and he just slobbered down my chin.
"And I was so violated and so offended. It's just such a terrible invasion."
• Veronica "Ronne" Froman
Veronica "Ronne" Froman, a retired Navy rear admiral and San Diego's former chief operating officer, described to KPBS an encounter that she said had with then-Congressman Filner a few years ago at a meeting 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?' " Froman said. "I jumped back. I was very, very startled. And I said, 'Yes, I have a man in my life.'
"And he said, 'who?' And I said, 'Linden Blue.' He says, 'Oh, of the Blues Brothers?' And he says, 'Maybe we can get together sometime and have lunch and he can support me for mayor.'
"I was really rattled. I got in the car with the two guys I was working with and I told them never to leave me alone in a room with Bob Filner again."
• Joyce Gattas
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."
Gattas, who helped craft the university's sexual harassment policy, said she has often seen Filner make "sexual comments to others. And I've seen the interactions with others when they cringe. I've experienced his sexual innuendos with me at various events that, again, have left me in that strange feeling of: This is inappropriate, this is unwanted and this shouldn't be happening."
Filner's chief of staff Vince Hall resigned this month via Twitter, citing his position "as a lifelong activist for women's rights and equality."
The mayor's fiancee, Bronwyn Ingram called off their engagement, citing his behavior in a statement issued last week, and she has now joined calls for his resignation.
On Thursday, Filner's fellow Democrats abandoned him when the San Diego County Democratic Party voted 34-6 urging the mayor to resign.
"We are not here to determine guilt or innocence," the party said in a statement. "However, in the best interest of the city, the San Diego County Democratic Party has voted to ask Mayor Filner to step down, seek the personal help that he needs, and allow San Diego to move forward."
Jackson's lawsuit, filed Monday in state court, names Filner and the city as defendants. San Diego City Attorney Jan Goldsmith said his office will defend the city but not Filner, who he said has hired his own lawyer.
Filner has been served a subpoena to submit to a deposition August 9, Deputy City Attorney Paul Cooper said Friday.
"Testifying under oath is part of due process," Cooper added in a statement. "We expect Mayor Filner to attend absent a court order to the contrary."
The ramifications go beyond political: Filner was supposed to be the keynote speaker at a meeting of women veterans next month on the issue of sexual assault in the military.
He has since been disinvited.
What the mayor has said
As the allegations of sexual harassment began to mount, Filner responded this month by releasing a video statement on YouTube in which he admitted wrongdoing and vowed to change.
"I am embarrassed to admit that I have failed to fully respect the women who work for me and with me, and that at times I have intimidated them," he said in the July 11 video statement. "It's a good thing that behavior that would have been tolerated in the past is being called out in this generation for what it is: inappropriate and wrong."
Despite his mea culpa, the calls for his resignation began to mount.
Last week, Filner issued another statement rejecting those calls, saying that he believes he will be vindicated by "a full presentation of the facts." But he also acknowledged, "I need help," and added, "I'm clearly doing something wrong."
Then on Monday, Jackson -- the first of the women leveling the claims -- came forward when she filed suit against him. In response to her lawsuit, Filner issued a statement saying he was "saddened" by the accusations, but "I remain committed to the people of San Diego and the work that needs to be done."
"Once due process is allowed to unfold, I am certain there will be a better understanding of this situation," he said, adding, "I humbly ask that through this vicious storm of controversy, people take a moment and temper their rush to judgment."
When CNN's Casey Wian approached Filner at a trolley station groundbreaking event on Thursday, he avoided his and other reporters' questions.
What San Diego residents think
A poll conducted this week by the San Diego Union Tribune and the local ABC affiliate, 10 News, found a growing number of San Diego's residents want the mayor to resign. Nearly 70% of those polled said Filner should step down, a 10-point increase from two weeks ago, when allegations first started to emerge, the newspaper reported.
A more informal poll of San Diego residents this week outside City Hall mirrored those findings.
But one resident, interviewed by CNN iReporter Chris Morrow, explained why he still supports Filner.
"He's actually really good for this city's population, especially the homeless population out here; I know he definitely cares about them ... I think it'd be a very, very bad move to see that gentleman resign."