What an utter witch blaming her young kids on the crappy attitude of her other ones, YOU are the parent Rach, YOU, you get the final say, you don’t want the kids to comfort wobble when he’s stropping TELL THEM, you’re not supposed to be their friends, you’re their parent!
Also, with toddlers his age, removing them from the situation and distracting them with something else AFTER you’ve told them a firm NO it’s very very basic parenting hun.
Notice how the politest kids in that house are the boys, the girls aren’t very polite at all. That’s your doing that one Rach no one else’s.