After Rebirth, I Remarried My Brother-In-Law Who Was Killed in the War. Why Didn't You Die?

[Double birth+marriage exchange+being a mistress+exile] The male members of the Shen family died in battle and were accused of treason and collaboration with the enemy. The emperor was furious and exiled them all. In order to repay the kindness of nurturing her in her previous life, Shen Qingyi paid homage to Empress Guanyin and became the daughter-in-law of the Shen family and also the mistress. After three years, he and his family returned to their ancestral home safely. In another seven years, he led the Shen family to start a business. In another fifteen years, the Shen family will be vindicated and their innocence restored. Unexpectedly, the deceased husband is still alive and has a family full of descendants. It turns out that she has been plotted against since the old lady entrusted her with her before her death. - When she opened her eyes again, she worshiped Guanyin again. But this time she married her brother-in-law who also died in the war. During her exile, she took revenge one after another. She returned to her ancestral home and continued to engage in business, happily being her widow. But when the man she saved on the way called her wife, She was stunned: "How come you're not dead?" The man bowed and said, "Perhaps Lady Guanyin cannot bear the separation of yin and yang between you and me, so I am grateful for your life-saving grace." She gritted her teeth: "The Shen family are all liars!"