The Reborn Me Is in the Belly of the Vicious Female Supporting Character

The entire grandfather's family was slaughtered, and his mother was bullied to death. However, the culprit, the prince, stepped on the Su family's corpse and became the emperor. As the eldest daughter, I was thrown into the woodshed. The father dotes on his concubine just because his aunt, who was born as a singing prostitute, is very similar to his Bai Yueguang. Even before he died, he didn't want to take a look at me. He only asked his servants to tell me that I shouldn't have been born in the first place and that I was the daughter of a poisonous woman. It wasn't until I died that I discovered the secret. My mother was a so-called vicious supporting actress, and the one who was her mortal enemy was the protagonist in this world. In this rebirth, I want to protect the Su family! But why was I reborn as a fetus in my mother's womb?