The Concubine Is Here to Rebel. My Sister-In-Law Exchanges Kisses and I Bury Her in the Earth.

[Double marriage exchange + scumbag abuse + sweet and sweet novel + marriage first, love later + years + double cleansing + the unknowing black lotus heroine x the self-strategizing love-brained male protagonist] In the last life, Ye Shi'an was married to the famous dandy young prince in the capital, and his sister-in-law was married to the powerful regent. Everyone said that the eldest sister married better than she did, but they didn't expect that the young prince was adopted as the regent in the end and ascended to the throne, making Ye Shi'an's mother the king of the world. However, the eldest sister could not defeat the regent's beloved concubine. She remained a widow for the rest of her life and had to kneel at Ye Shi'an's feet and bow her head. The eldest sister was so jealous that she tried her best to prevent Ye Shian from dying together. Opening his eyes again, Ye Shian and his sister-in-law both discussed the wedding ceremony. The eldest sister snatched away the handsome and affectionate young prince, but gave Ye Shi'an the regent who doted on his concubines and killed his wife. She said with a smile: "Sister, it's your turn to kowtow to those concubines and make amends, and taste what it's like to be a widow!"