Caught cheating three times, I ran away

A human woman, Corina, is falsely accused of cheating twice during her four years as mate to alpha wolf Ethan. After a third setup, she stops defending herself. She calmly accepts exile and signs away all rights to their son, Leo. No tears, no pleas. Ethan expects her to break—but she walks away. Only when she disappears does he realize the truth and search desperately. But Corina is already gone.