Suspicious car

Last night we woke up in the middle of the night. My son was having a bad dream and making sounds. He woke up and switched on his light. A few seconds after we heard a car starting and driving away from our street. It was strange as we live in a street with hardly any traffic, especially not in the middle of the night. The neighbors did not have any cars on the driveway and breaking in seems to be quite common in Sweden in the summer months when many people are away, so maybe they were checking if anyone was home. I kept on looking outside for a while, but of course the car did not come back. It took quite a while before we managed to fall asleep again.