I Got Reincarnated as the Villain's Wife

After an unexpected accident, Bella De Guzman wakes up seeing herself in the body of someone else. Turns out, she got reincarnated as a character from the novel that she’s been reading. But she didn’t expect that she’ll be reincarnated as Ariah Laurenzia, one of the princesses of the Kingdom of Ethashalia which is on the verge of falling apart from the novel she’s been reading. The worst scenario is that she’s married to the novel’s worst villain, Grand Prince Elijah Carlisle of the Lucraidian Empire—the man who was feared and hated by all nations!

Of all the characters that she will be reincarnated, why did she become the villain’s wife?!