Uncle, What Do You Want Me to Do?

Requesting: Brother-In-Law➕the Male Protagonist Is Coquettish➕guiding the Lover➕it Has Been Planned for a Long Time

Want to watch something like "Exciting!" My Secret Lover Is My Fiancé's Brother-in-law".

The Male Protagonist Is More Than 10 Years Older Than the Female Protagonist

No

Romance Novel

I want to read a book similar to "The School Beauty Was Pampered by Him". Is there a novel where the hero and heroine are finished, and then there is a sub-CP, and finally there is a novel where the son and daughter of the hero and heroine grow up?

I... Have No Interest in Any Books Anymore...