Would IBU to have angry words with my MiL for driving DD age 5 through a city centre without a car seat and just restrained with the lap portion of an adult seatbelt?
It was a 5 min journey, collecting DD from DH and taking her to MiL house. The journey could have been done by bus. MiL has a car seat for DD but had taken it out of her car to collect her friend plus bags from the airport and claims that she can’t manage to reinstall it by herself (it has simple isofix attachments).