Tron, who had been mayor of Draveil for 25 years, frequently gave employees foot massages, which they did not feel comfortable refusing, and which in one instance led to the assault on Virginie Ettel, according to court documents.
She later said: "I still can't believe it. When I heard all the facts had been accepted as true it was a relief because that's what I've been wanting for 10 years."
Tron and Gruel contributed to creating a "hypersexualised environment" at Draveil's town hall, the documents said.
The charges were dropped in 2018 due to "insufficient evidence" but a jury at an appeal this week upheld Ettel's accusations. Tron was cleared of the accusations lodged by Eva Loubrieu, another employee.
In France, the global MeToo movement had been slow to catch on but was undergoing a revival in the past few months as the MeTooInceste and MeTooGay campaigns took hold, with survivors telling their stories of abuse against them as children and gay people.
An investigation into rape accusations against Gerald Darmanin, the interior minister, has now been reopened
