The villainess is obsessed with me?!?

*WARNING!! MAY BE ADULT SITUATIONS!!*
This is my first time writing smth so I hope its good!!

Yuki was just another person in her life, she was a rich CEO of a huge company. That is, until she died from a truck hitting her on her way back home. That day, she was reincarnated into her favorite historical novel as the heroine. But, instead of loving the heroine in the novel, she loved the villainess , Her highness the Crown Princess Cassandra. The novel was alright, it was a story about a duke's daughter named Angelica, she had pale skin, white hair as beautiful as the moon light, big pink eyes and was the prettiest girl in her empire. So much so that the Crown Prince, Mathew, fell for her, Cassandra, the fiance of the Crown Prince grew jealous of her so, she bullied her and the story went on from that as the Crown Prince and the Heroines love for each other grew, overcoming each challenge together. But, Yuki didn't want this. She wanted to date the villainess, so she decided to start seducing the villainess. Starting out as friends and grow their relationship from their. But something suprising happened, from first sight the villainess seemed to love HER instead. With Cassandra's growing obsession with Angelica(Yuki), will Angelica be able to stop Cassandra's jealousy with everyone ad everything that approached Angelica while also being able to stop the marriage with the crown prince and princess and achieving the happy ending with Cassandra?

"Angelica, don't love anyone except for me, or else, I might go insane and kill everyone that approaches you.." Cassandra said with a smile on her face,

"Cassy!" Angelica said with a joyful smile, "Look at these flowers! Arent they beautiful!"
"Not as beautiful as you" Cassandra said with a flirtatious smile, clearly trying to seduce Angelica as Angelica stuttered with a flushed face