I Have Been Cheated On, But Never Cheated On Anyone

After ten years of marriage, i recent found out that my wife is a serial cheater. She begged for forgiveness and i did for the sake of our family. I'm beginning to feel that she still hasn't changed her ways and my suspicions are being confirmed. I'm getting ready to call it quits but the truth is she needs me more than i need her. Should i really still be caring for her, in every sense?