I Transmigrated, So Why Was My Husband Swapped?

When Shen Yuan opened her eyes, she saw a bright red canopy embroidered with golden peonies. Dragon-and-phoenix wedding candles crackled in silver candlesticks, and the room was thick with the cloying scents of agarwood, longans, and red dates. She sat bolt upright. It felt as if hundreds of needles were stabbing into her head at once, and the original owner's memories came flooding in: Shen Yuan, a concubine-born daughter of the Prime Minister's household. Today was her wedding day, and she was marrying Gu Yanzhi, the legitimate eldest son of the Marquis of Ningyuan's household.