I'm looking for the name of a romance novel ~~ I'll add more points if I find it

I saw it on the Internet two years ago. It seems to be the April website, but I can't find it now ~ Please help ~~~
The female protagonist seemed to have been adopted by the male protagonist's family. The male protagonist and the female protagonist grew up together. Later, their grandfather passed away and the two of them got married. However, another person close to the male protagonist died. The male protagonist was very sad and blamed the female protagonist. He began to treat the female protagonist badly.
At the beginning of the article, the relationship between the two was bad. The female protagonist worked as a cleaner in the male protagonist's company and was restricted by money. Later, the male protagonist suddenly asked the female protagonist to be his secretary... Once again, she accidentally heard the female protagonist say that although the male protagonist did not treat her well now, she still loved him. The male protagonist was touched and their relationship improved ~~~
After the two of them reconciled, the female lead became terminally ill and put on a show to make the male lead think that he had fallen in love with someone else. In fact, the male protagonist knows everything. He watches the female protagonist's every move every day and finally comes to the hospital ~~ In the end, of course, it's a happy ending

Answer 1

I'm just someone who loves reading novels, and I haven't learned the names of all romance novels. But if you can tell me the name of the novel you're looking for, I can try to help you find it.