John Wesley on 2 Samuel 14:9

Be guiltless - If through thy forgetfulness or neglect of this my just cause, my adversaries prevail and destroy my son, my desire is, that God would not lay it to the king's charge, but rather to me and mine, so the king may be exempted thereby. Whereby she insinuates, that such an omission will bring guilt upon him; and yet most decently orders her phrase so as not to seem to blame or threaten the king. This sense seems best to agree with David's answer, which shew's that she desired some farther assurances of the king's care.