Reborn into a Marriage Swap, I Became the Sickly Heir’s Cherished Treasure

One day, Shen Yuetong and her cousin Shen Yuebi were reborn at the same time. In their previous lives, they became brides chosen to bring good fortune. Yuetong married her cousin's intended, Deng Ye, the son of Jindu's richest man, who had been unconscious for three whole months. Her cousin, meanwhile, was sent to Prince Duan's manor to become a concubine to the frail, sickly heir. But Yuetong's marriage brought good fortune as intended: Deng Ye woke up that very night. From then on, the Deng family treated her like a lucky charm. Her husband adored her, her parents-in-law loved her, and even her sister-in-law competed to curry favor with her. Years later, the emperor took notice of the Deng family, which rose to become Dongyin's wealthiest clan. Deng Ye was made a marquis and general, and Yuetong enjoyed a life of wealth and luxury alongside him. Shen Yuebi's fate was very different. After she married into Prince Duan's manor, the heir, Liu Moyuan, grew even sicker. Crows circled the rooftops at night, crying mournfully, and the entire household decided she was a bringer of bad luck, earning the old princess's hatred. The prince and princess also made life difficult for her at every turn. Her married life was like walking on thin ice, and in the end, she was framed for losing her virtue and drowned in a pig cage. Seeing her cousin desperate to switch back to their original matches, Shen Yuetong remained calm and unbothered. After all, she was clever and resourceful. What could be so hard about handling Prince Duan's manor? Besides, Shen Yuebi had no idea that every member of the Deng family was wicked, ruthless, selfish, and mean. The reason the Dengs would climb to the top and soar to glory was entirely thanks to her. Now that she was reborn, without her lucky influence as a wife, the Deng family would likely struggle to rise again. As for Shen Yuetong, things went smoothly for her from the start. She became the mistress of Prince Duan's manor and the apple of the heir's eye, cherished beyond measure in a love story sweeter than sweet...