Who is Liu Rui in the full text of Shen and Chu Haoxuan?

Shen in the full text of Liu Rui is the cousin of Chu Haoxuan. Shen and Chu Haoxuan are the protagonists in the novel Love after Marriage: Overbearing President. It is a modern romance novel written by Staryu, an online novelist. Liu Rui in this article is Shen's cousin and has always been jealous that Shen has a rich husband.