Wasn't he supposed to be beaten to death? Why did this powerful cousin love him so much?

Jiang Sese transmigrated into a political drama and became her cousin, a cannon fodder character who wouldn't survive more than three chapters before being beaten to death.
She was said to be a distant cousin, but in reality, she had absolutely no connection with the Xie family.
Original owner: Love-struck, caused all sorts of trouble, madly infatuated with the male lead, and ultimately died a tragic death.
Jiang Sese looked at her bewitching face in the mirror, and then thought about the way she was "beaten to death with sticks" in the book, and she trembled.
Love-struck? Not a chance! Survival is the priority!
Therefore, Jiang Sese quickly formulated the "Salted Fish Survival Guide":
Rule #1: Stay away from the male and female leads, cherish your life!
Article Two: Cling tightly to the strongest thigh in the manor, your eldest cousin!!
From then on, the Xie family's style changed to:
The male lead said affectionately, "Little sister Se Se..."
Sese (with a terrified look in her eyes): "I was just passing by, I'll be right there!"
The female lead, amidst the fragrant aroma of tea, asked, "Cousin Se Se, is there something you're unhappy about with me?"
Sese (shaking her head frantically): "No, no!" (Please let her go!)
As for that older cousin…
Sese (serving tea as a lackey): "Big cousin, you've worked hard! Big cousin, have some tea!"
SeSe (sincerely praising): "Big Cousin's outfit today looks especially menacing! So handsome!"
Young Master Xie looked at his distant cousin, who had suddenly clung to him like a little tail, with clear eyes but actually foolishness and a unique way of flattering him, and fell into deep thought.
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When Jiang Sese risked her life to save Xie Yihua, Xie Jue, who was usually unflappable, finally lost his temper: "Sese, why don't you believe me? If only one of you can live, I will choose you."
SeSe was also shocked: Huh? But aren't you a doting brother?