Need an hour for a decent daily walk. People who don’t walk anywhere are contributing to the increase in obesity as well as global warming. One of our neighbours takes the children to school by car. It’s a ten minute walk. She’s not slim…
How old are the children? If you have every tried to get children to go anywhere on time, you will realise that it's quite hard. If secondary age they usually require a bag with several tonnes of books, PE kit, musical instruments etc etc. At primary they should just be able to scoot or cycle, but they tend to be reluctant when it is cold or wet for example.
Another factor is where you go afterwards. If you are driving to your job and dropping the kids en route for example. We all know that public transport tends to be terrible in a lot of places. Plus if you have got the kids to school on bikes and scooters, does the school have provision to keep those bikes and scooters safe. Some do, but many don't.
Or she could just be lazy... I think that it's best to avoid snap judgements though.