Dinner for animals is a big deal; disrupt a nice, loving dog during dinner and the risk of the dog biting the disturbance is highly likely. It is the same with cats and possibly even other animals.
Mama cat here wanted some time for herself by eating alone. But her little babies, all six of them, want to eat with her or get milk from her while she is eating. The hungry little ones come first, and so mommy relents because who can resist cute little kitties?