Might be weird to you but it's not weird to a lot of big old families
Parents have kissed their kids on the lips platonically for thousands of years
You're literally a part of your mother and father they're allowed to kiss you as a kid ... And I doubt a 3-4-5-year-old child is going to belt you ... Not talking about kissing your dad on the lips when you're 40 lol
Just parents showing affection to their little kids.. which is as old as humanity
Am I outraged my mother kissed me on the lips when I was five, no lol