The Divine Doctor and the Special Agent Consort

The poor girl, with no parents to call her own, was sold off and then beaten to death with a club. When she opened her eyes again, a murderous glint flashed in them. Anyone who bullies or insults me gets hit right back! The Shennong Cauldron, which she had desperately protected in her previous life, has become one with her in this one. With a heaven-defying treasure in hand, she has nothing to fear, not even while fleeing famine! She has her little brother back, and she swears to protect him at all costs. Whoever hurts him, she'll hurt their whole family. She only wanted to live a carefree life as a landowner with her brother. How did she end up becoming the uncrowned queen?