Driver Error

Some days, the only error resides in owning a driver's license and operating a motorized vehicle capable of sitting more than one person.

Yesterday, Simone packed up baby, mother-in-law and the dog. They drove across town to pick up the 17 year old. After a successful pick-up, late by a mere minute (the 17 year old was late, not Simone), Simone drove a little further and dropped her mother-in-law a half hour early for her 4 pm appointment. She then proceeded to the 11 year old's school, arriving in time to see the last of the busses leave the property.

They then went to the 11 year old's singing lessons and, after dropping off the kid, Simone's cell phone rang. Sighing, she checked the display. Her mother-in-law was calling. "I made a mistake," she said. "My appointment was for 1:30 pm, not 4 pm, so I missed it. Can you come and pick me up?"

Simone said she could.

"I need to be dropped off at home," the 17 year old pointed out. "I need to get ready for my graduation."

So Simone dropped the 17 year old off then drove across town again to pick up her mother-in-law. They negotiated the 4:30 pm traffic and made it almost in time to pick up the 11 year old. Baby was fast asleep and snoring by this time. The dog, however, needed to use the facilities. Simone had to walk him around the area while Baby B screamed incoherently because he'd woken up when the car door slammed shut and Mom had disappeared from his line of vision.

The business having been concluded, Simone and dog hopped back into the car and everyone went home.

The question is.... who was in the car at this point?