Responses
*spoiler alert*
To put it briefly, and this waaaaay down further in the story, she was taken there for her safety. It wasn’t even really because of her dishonouring her family that she is with Si Yehan. The life she lives now is not her own. Secret and hidden identities, unknown rich family members, top level societies, expert level techniques that only come out when she’s drunk. To literally answer your question is to unravel a huge spoiler of the story because one explanation leads to another.
SOmebody explain to me how wan wan even got to live with the demon king in the first place???