I must concur with you guys. No matter how much parents may say they love their kids, deep down, they all despise the sprogs to varying degrees. I do think parents subconsciously let their kids get hurt at times, either to let them learn a lesson on their own, or (going out on a limb) perhaps as a form of personal revenge. If Sprog falls and scrapes his knee on the concrete, Moo might think to herself "That's what you get for throwing a tantrum in the store, you little bastard!". After relishing the vengeance for a few seconds, she goes to Snotley's aid to stop him from wailing.