Ep.4 — Mistress, You Picked the Wrong Mother full episode

After returning home, Lee Group CEO Esther is publicly humiliated by a woman claiming to be her son's wife. She soon discovers her son's affair and his plan to use her welcome-back party to legitimize his mistress. Esther stays silent and strikes back at the party, stripping her son of succession and naming her daughter-in-law Rachel as the new heir.