Ignoring the horrible job done strapping the child in, and the fact that shes outgrown that seat by a lot... is that a infant seat facing forward? wtf..
Maybe just a joke shot while they were pulled over on the side of the road? I could see a little kid getting into their sibling's carseat, try to buckle themselves in and say "Mommy look at me" while the Mom takes a pic while laughing.