In which novels were there plots where the female lead and the male lead got married because of a contract, and then the male lead slowly fell in love with the female lead?

In that novel, the female protagonist was contracted to marry the male protagonist because of her grandfather. As a result, the male protagonist gradually fell in love with her. The second female protagonist and the female protagonist made a bet to see who the male protagonist liked. The loser would leave on his own accord. In the end, the male protagonist was tricked into a seaside villa and drugged. At that time, the female protagonist's grandfather passed away. Because the second female protagonist misunderstood that the male protagonist did not love her, she found out that she was pregnant. She fainted at the hospital entrance and was taken abroad by the second male protagonist. They gave birth to twins many years later. The female protagonist returned to hold a new product launch as the second male protagonist's fiancée (I think she's a fashion designer). At the launch, her daughter happened to meet the male protagonist and pestered him to buy a new version of Pleasant Goat toy. When she reached the mall, her daughter called the female protagonist to pick her up. When the female protagonist arrived, she reunited with the male protagonist. The male protagonist found out that this was actually his daughter. After that, the son broke into the male protagonist's company alone and demanded to hand over his mother and sister…
The second female lead is an employee of the male lead's company.

Answer 1

This novel was called " She Wants a Divorce Every Day After She Transmigrated into the Book." After the female protagonist, Jiang Tangtang, transmigrated, she was pulled by the male protagonist's grandfather to quickly get married to the male protagonist and become his wife. At first, the male protagonist was quite disgusted with her, but as time passed, he gradually fell in love with Jiang Tangtang.