A MILDURA woman has been fined $500 after she "lost her composure" and reversed into her ex-partner's car.

The accused pleaded guilty to the offending when she faced Mildura Magistrates' Court on Wednesday.

About 7pm on January 11, the woman was at a local caravan park with her three children and niece.

When the children's father and his partner came to collect them, an argument erupted.

The ...