
They changed the plot for the webtoon. In the novel, the grandpa dies almost towards the end of the main story. By that point, they were already openly "dating" and ML also announced that he's married in the media without revealing MC's identity. ML also handled the funeral preparation of the grandpa.
Idk what grass the authors were smoking when they decided to make such a huge change, that only made the ML look bad.

Ahh then based on what you shared they definitely just added this random stuff to add more drama and drag the story a bit. None of the actions in the last few chapters from both male and female MC have made much sense especially given how their characters were established at the start of the series... money ruining another story again
They're dragging the story because of money. No way will the male MC miss out on her grandpa's funeral for a press conference, no way is the female MC being all emotional and thinking of divorce because she now suddenly thinks she's a burden. The writing quality is decreasing just to make the story longer