My Mother Has a System but Won't Use It - Chapter 2: Demonic Lust Sutra

After spending half a year in the province, Cheng Yang took a luxurious cruise for seven days.
Accidentally hooked up with a CEO on the way.

Later, Cheng Yang found out that he was pregnant.
Just as Cheng Yang was preparing to secretly give birth to the baby, it was a coincidence that he fell asleep in the big president’s bed.

It’s impossible to run with the ball, his man is handsome and rich.
Must cling tightly and can’t be torn down.

- Description from Novelupdates

I died in an explosion—a betrayal engineered by the man I trusted most.But instead of the end, I woke up in a new body. A noblewoman’s body. Evelina, disgraced and hated, accused of poisoning the Crown Prince of a kingdom where werewolves rule the land.And worse?The man whose life I supposedly tried to end is now my fated mate.Damian, the Crown Prince, is as cold as the moonlight that binds us, his piercing silver eyes filled with distrust every time they land on me. He doesn’t believe my innocence, and frankly, I don’t care.My only priority is survival in this dangerous, medieval world—and figuring out why fate decided to shove me into the life of a traitor.But the longer I’m near Damian, the harder it is to ignore the pull between us—the undeniable heat of the mate bond that makes his touch electric and his presence intoxicating.Enemies lurk in the shadows, including the woman who thinks she should be his Luna. Court intrigue spirals out of control, and the person behind Evelina’s betrayal might be closer than I realize.Damian’s trust is my only shield, but when the truth of my transmigration comes to light, I’m not sure even that will be enough to save me.Because in this world, it’s not love that conquers all—it’s power. And mine might not be enough.

Yu Linglong is the shu (born of a concubine) daughter in a general’s family. Since her mother was only a tribute dancer, her position is the lowest of the low. She used to live with her mother outside the father’s residence, and they only received some monthly money from him. He didn’t bother seeing them. But when her mother dies, she moves into the general’s residence.

The general is a very irresponsible and violent man. He doesn’t really get attached to women, just letting his lust dictate his actions. His wife is a jealous woman, who killed one of his previous concubines, because he doted on her too much. She similarly wants to get rid of Yu Linglong, in part to vent her frustrations over her husband’s cheating habits.

Because the sixth miss – the general’s legitimate daughter, was bitten by a snake, she needs detoxification. The cure was apparently getting poisoned by scorpions, to fight one poison with another. But since she’s already weak, they decided it would be better if she drank the blood of someone poisoned by scorpions instead. The general’s madam naturally decided to use Yu Linglong’s blood. During the process of getting bitten by the scorpion, the original timid Yu Linglong died of fright (and maybe poison? it’s never made clear). Then Yu Mei takes over her body.

Yu Mei is a modern woman. She was some mafia boss, so she’s very capable with fighting and overbearing attitude. She died because the man she fell in love with betrayed her and killed her. So she doesn’t trust easily afterward.

Since she took over Yu Linglong’s body, she refuses to adapt to the circumstances of a lowly illegitimate daughter, and uses her violence to fight for a peaceful life, where no one will challenge her and plot against her. Basically, she beats them up into submission. In the meantime, she acquires a tail – a very persistent prince, who only seems to stick to her harder, the colder she treats him. Did ancient men have such heavy tastes, she wonders.

- Description from Novelupdates