“I’ve done nothing wrong,” he said in a brief interview last week. “I’m happy to visit with anybody who has a concern and explain the facts to the extent that I am allowed to under the settlement agreement.”

Details of Ms. Greene’s allegations have been known for several years, ever since she filed suit against Mr. Farenthold in 2014; she said, among other things, that Mr. Farenthold told another aide he was having “sexual fantasies” about her and that she was fired after she complained.

But she was not the only Farenthold aide to find fault with the office environment; in 2016, two additional aides complained — prompting the congressman to hire an independent law firm to investigate, a spokeswoman for Mr. Farenthold, Stacey Daniels, confirmed in a statement.

One aide reported that Mr. Farenthold’s chief of staff, Bob Haueter, treated the female employees “differently.” The second aide — identified by The Houston Chronicle as Elizabeth Peace, a former press secretary to Mr. Farenthold — reported to Mr. Haueter that the first employee “did herself engage in inappropriate sexualized commentary in the workplace,” the statement said.

The review found no evidence of “gender bias” or “inappropriate sexualized comments,” Ms. Daniels said, adding that all staff members, including Mr. Farenthold, later “took sensitivity and anti-harassment training to ensure full compliance with office policy and the law.”

In an interview, Ms. Peace said “the behavior never changed,” which was partly why she decided to quit in March. “There were a lot of inappropriate things that happened in that office that I don’t think would have happened if the congressman hadn’t already set the tone,” she said.