Substitute Wife for Marriage: Paranoid CEO Is Super Strong

For the sake of the family business, Lin Nuan married into the Gu family for her sister and became Gu Tingchen's wife. She met Gu Tingyun on their wedding night! Then, he was a cold and domineering brother-in-law who did not eat fireworks, and she was a beautiful sister-in-law who was as hot as the sun and sometimes cute... "Since you married into the Gu family, you must fulfill your obligations as a wife, but you cannot exercise your rights as a wife!" "Don't forget, I am your legal wife!" As everyone knows, she is not his sister-in-law, and he is not her brother-in-law...