I, too, assume that that means the PASSENGER, not the driver.
However, the child may be charged (probably in juvenile court) with violating 257.677(2), interfering with a driver's control over the driving mechanism. *wink* In the interest of justice, I suggest that case be dropped.
The mother may be charged with violating 257.677(1), loading the front seat so as to interfere with her operation of the driving controls; and 257.626c, carelessly operating a vehicle.
Of course, those are all Michigan laws. I don't subscribe to their theory that interstate highways operate on the laws of the driver's home state. Ohio law, with which I am not familiar, will govern this prosecution.
FWIW, I am not a lawyer nor do I play one on TV. My posts are not legal advice.