Depends on the age of the children. My 7 year old twin grandchildren can easily unstrap themselves and even though they have child locks on the back doors they could get out through the front. They would most likely stay put if I told them to but you never quite know if they are not your children.It is very dangerous to leave children in a locked car .The DiL is only putting the needs of her children first .I would not call that self-centred.
Army horses loose on London streets
To go through chemo therapy or choose not to?