Go practice your harp. No more burping contests at the dinner table, please. Of course, running out of gas is the best thing that can happen to get their attention. God uses such times to direct His children back to Him, the source of all strength and love. If mothers turn to Him to provide them with love for their children, soon they will begin loving with a much greater love than they had in themselves.
Children go through stages when they are more lovable, and stages when they are less lovable.
When they are cuddly and cute, it does not require grace to love them. Some children never are exceptionally cute, so maybe they were never in great demand to be held in the first place. The point is, mothers need heavenly grace to love their children through all the stages, from the adorable toddler stages through the acne-faced teenage years. A mother's love should be consistent and unconditional, regardless of the loveliness or unloveliness of the child. This requires grace, and if a woman tries to do it without God's grace, she will necessarily fail.