Brazil’s first lady Janja Lula da Silva lashed out at billionaire Elon Musk during a G20 social event on Saturday where he spoke about the need to regulate social media to control disinformation.

A ship’s horn blared as she spoke and she joked: “I think it’s Elon Musk,” before adding: “I’m not afraid of you, f*** you Elon Musk.”

Musk, the owner of social network X, reacted to a video of her remarks by posting a laughing-out-loud emoji.

In another post, he added: “They want to lose the next election,” in a reference to President Luiz Inacio Lula da Silva.

The president’s wife was speaking at an event ahead of the Rio de Janeiro summit of the G20 group of major nations scheduled for Monday and Tuesday.

Musk’s social messaging network was suspended in Brazil for a month this year for failing to appoint a legal representative in the country and ignoring court orders to block accounts accused of spreading “fake news” and hate messages.