This is the moment two young children stand outside their mum’s car as she and her new boyfriend allegedly romp inside, leading to the couple being arrested for abandonment.

The children were told to get out of the car and wait outside because the couple wanted a few minutes of intimacy in the backseat, according to the news site El Litoral.

The incident was filmed by an outraged resident at Pereyra Iraola Park in the city of La Plata in the eastern Argentine province of Buenos Aires.

In the video, the young girl is seen staring through the window as her younger brother, too small to see through the glass, plays with the door handle.

Eyewitnesses said they saw the children, aged 5 and 2, waiting outside the car and realised what was happening. The police then arrived on the scene and arrested the couple.

According to El Litoral, the mother is 28 years old and the man is not the children’s father. They met just a few days before the filmed incident.

Prosecutor Gabriela Mateo said the man is not exempt from responsibility and remains accused of ‘abandonment’ along with the children’s mother.

Mateo also said that they could face more charges such as corruption of minors and even sexual abuse.

The prosecutor said both children have been placed in care to protect their “physical and mental integrity” and that they are both in good health.