Fantasy: Invincibility Starts From Marriage

Traveling through the Fantasy world, Su Xuan became the young emperor of the Su family of the Northern Territory Imperial Clan, and the holy son of the Dayan Holy Land in the Eastern Wilderness. He had a terrifying background and a demonic talent.
I thought that my life would continue in this simple and unpretentious way, but what Su Xuan didn't expect was.
At the age of eighteen, the System awakens.
And the first task issued by the system was to get him married!
Moreover, the system has designated this marriage partner for him!
That is the Saint of Jiutian Taiqing Palace, Leng Ruoli!
In order to get generous rewards from the system, prove the eternal truth.
Su Xuan made up his mind to forcefully marry Leng Ruoli!
What? disagree?
Do you understand the value of the Su family in the Northern Territory? !
With the support of his family and his own efforts, Su Xuan got what he wanted and married Leng Ruoli.
"Ding! On the first day of marriage, you will be rewarded with the Chaos God and Demon Body!"
"Ding! On the second day of marriage, you will be rewarded with the Six Paths of Samsara Fist!"
...
"Ding! On the fifth day of marriage, you will be rewarded with the Eternal Emperor Sutra!"
Invincible, starting from the moment of marriage!
...
My name is Leng Ruoli, and I am the reincarnation of the Empress of the Immortal World. I originally planned to practice normally and return to the top to avenge my past life.
But unexpectedly, I was proposed to by a guy named Su Xuan.
Haha, as an empress, how can I get married?
However, the power behind Su Xuan is very strong. Direct refusal will affect the power behind me.
So, I proposed a competition, but unexpectedly, I got myself involved.
But so what?
As an empress, I will not give in...
Gradually, I discovered something was wrong with Su Xuan.
Terrifying physique, infinite magical powers, rising cultivation...