Some mothers !

This is a rant! I left my place to go to gym it was a 35+ degree day (Celsius)  I noticed a mother getting out of a parked car and walking inside and saw a infant in the rear seat sleeping. I didn't think much at the time it just seemed like maybe she was quickly knocking on the door to get someone so I carried on. Over an hour later I return home I see the car so I stop and quietly check to make sure the baby isn't in there and low and behold there is the infant still in the car with the windows down!!!! I called 000 and they came and removed the child in a ambulance the mother ran out attempting to drive off when she heard the sirens! I now know the child is thankfully ok but I'm beating myself up over it now like why didn't I wait around.. Why did I keep driving why didn't I take action sooner!! God forbid if that child passed away I couldn't possibly forgive myself