I Was the Villainess Who Would Die by the Hands of the Male Lead, but I Know This Cliché! I thought it was a pretty good deal to die unjustly, as a payment for the price I paid for being the villainess. Until I realized that I couldn’t escape from the original plotline. If I was going to die anyway according to the original, then let’s give a kiss to my handsome husband! “Please satisfy me like a snake flower of Ridelhoff. You never know, it might even lead to some benefits.” … Why did the original plot start to change?

흔한 빙의물인 줄 알았다 / I Thought It Was a Common Isekai Story
https://teenmanhua.com/manga/i-thought-it-s-a-common-possession