DD has always walked along to the school bus stop in the morning, so I've never picked up on this. She's left school now so there's nothing that can be done, but I'm a bit 
Her friend's mum drives her to the bus stop, parks next to where DD is standing waiting and then the two of them sit in the car looking at her until the school bus comes. Even in the rain and the snow DD stands next to them while they sit in the nice warm car! I would never do that to her friends!
DD just laughed it off and said the friend's mum is a bit odd!