Vyacheslav and Victoria Samoilov were walking through a park in Western Russia with their young daughter when he spotted text messages from another man on her phone.
He quickly became angry with his wife - and the pair soon began rowing furiously.
But, as the couple grew more and more angry with one another, Victoria took things a step further, grabbing their child and throwing her to the ground.
Shouting into her husband’s camera phone, she can be seen furiously stamping down toward their 18-month-old daughter’s head.
Thankfully, she stops her foot at the last second - and it has been understood that the child was not injured in the incident.
Eyewitness Ludmila Ignatyeva told Russian television channel HTB: "I saw them arguing and the woman threw the baby on the ground then pretended to trample on it.
"The man fled in one direction and the woman ran in the other and the child was left on the ground."
The film has now been passed on to police and social services, who are looking into the incident.