WATCH: Kim Kardashian reveals North's harsh comeback when they argueIn a new interview with Oh Bubble, Kim spoke about being a mother to four kids: Saint, Chicago, Psalm and their ringleader, Northie.When asked about the meanest comment she’s ever copped from one of her kids, Kim surprised absolutely no-one by sharing one from her sassiest child."Every time I get into some kind of disagreement with my daughter North, she thinks this is a dig to me," Kim explains.