What would you do?

Re

So my husband and I had walked to the park. Same kids come with a teen I think. A lady drive up in a truck. She was talking o them. When I looked over at them I saw she had a car seat in her lap. Someone else driving. I told my husband I think we should call cops and he said no let it go. So what do you think? I let it go. And hope nothing happens to the baby

Yes. I could see the baby’s arm moving. I was closer to her than the kids she was talking to. More like yelling to. My husband didn’t see. He was playing with our son on the swings.