Transmigrated As the Male Lead’s Widowed Sister-in-law? The Villainess Refuses to Be Redeemed

[Transmigration to the 1970s + System + Love Developed Over Time + Military Marriage + Transmigrated Woman vs. Reborn Woman] (New book, low rating at first, but will rise later, so feel free to jump in!) Upon waking, Shen Nanchu found herself transmigrated into the body of the male lead's vicious widowed sister-in-law. In the book, the original owner was power-hungry and used every trick in the book to marry the eldest son of the Pei family, the male lead's brother. However, after the male lead's brother's death, she immediately slept with the male lead and, after the Pei family was unjustly dismissed, betrayed them and sought a better position. In the end, she met a tragic end, her body never found. Truly a classic vicious female supporting character! System: To survive, please activate the whitewashing system! Shen Nanchu: Whitewash? How can a vicious female supporting character be whitewashed? System: …