A state trooper saw the 39-year-old woman swerving along I-94 in Waukesha County around 1 a.m. Sunday morning.
The video shows the woman nearly hit a car in the next lane.
A state trooper said that he saw kids aged 7, 9, 10 and 12 crammed in the back seat.
There was boy on the right and the girl on the floor not wearing seat belts.
"Initially it's just a conversation you're having with the person and she's having trouble with that," said Wisconsin State Trooper David Hanson.
It appears the driver wasn't even sure how many kids she has in the car.
"She couldn't just say six, which a sober person would know, she had to count them," said Hanson.
She was seen stumbling as she tried to walk a straight line and couldn't keep her balance when asked to stand on one foot.
The woman told the trooper she'd been drinking wine coolers.
She said her own children were in that back seat along with relatives' children.
The driver blew a point 0.11 in the preliminary roadside breath test.
She is out of custody now for the first OWI and is due in court for a first appearance later this week.