My Wife Rekindled Her Old Flame with My Brother, So I Took Our Son and Filed for Divorce!

I'm the illegitimate son of the Pei family, the one they're most ashamed of, yet I've secretly been in love with my older brother's fiancée, Shen Siwan. On the day of my brother's engagement, he unexpectedly brought home a delicate, sweet-natured beauty and declared that he would marry no one else for the rest of his life. The Shen family has a hundred-year history. Old Master Shen flew into a rage on the spot and prepared to withdraw his investment in the Pei family. But Shen Siwan stepped forward and said she was willing to marry me. That was the only thing that saved the relationship between our families. After we married, Shen Siwan gave birth to an adorable son for me. But three years later, my older brother suddenly came home in disgrace with the daughter he had with that sweet-faced beauty. To my surprise, instead of blaming him, the Pei and Shen families threw him a lavish welcome-home banquet. Yet when I used to come home even a little late, Father would punish me according to the family rules, and Shen Siwan would make me kneel. At the banquet, after I drank in Shen Siwan's place until I was violently sick, I overheard her talking to my brother in the restroom: “Yanchuan, I married Pei Zhouxing and had a child with him purely to save face for our families. That woman is dead, but the child is still young and needs a mother's love.” “Just say the word, and I'll divorce Pei Zhouxing right away. I'll raise Yanyan as if she were my own daughter.” I smoked through the night, and finally understood. Since my love has been misplaced, I'll never see them again for the rest of my life.