Jing Xuan is protective, but not of all family members. In fact, he only protects Tang Huai.
To put it clearly, he's a man who values romance over everything else. He won't think highly of Jing Peng just because Jing Peng is his brother.
He believes he is ten thousand times better than Jing Peng, whether in the past life or this one.
For someone as smart as Tang Huai to fall for Jing Peng, she must be blind. Otherwise, how could she think what he did for her in their past life was done by Jing Peng? She was so blind that she couldn't tell him and Jing Peng apart.
Forget it, forget it, those things are beyond the Milky Way Galaxy now. No need to think about it anymore. In this life, he can have all of her, and he's content.
Jing Peng is a eunuch, so be it. Whether Tang Huai treats him or not, it doesn't matter. Some people's fortunes in this life are cultivated from the previous life. Jing Peng's previous life must have been terrible, so he deserves no blessings in this one.
