Responses
Okay so I'm not sure if this applies to Korean culture but in Victorian culture or european culture, from what I'm seeing in this little land of Euro make believe, when you marry your spouse, under the church, it's seen as you both become of one flesh. Therefore, whatever siblings your spouse has, also becomes your sibling. So according to etiquette, if she marries her brother-in-law it would be seen as in the same light as her marrying her brother. Yes it's twisted and it doesn't make sense, but keep in mind, that's what this Victorian era kind of time, said about marriage among in laws
I’m assuming calix is the ML right? Things were going pretty well and intimately with einz but seeing how she “feels at ease” with calix is definitely a “he’s the ML” bell ringing… but she hasn’t even spent the same amount of quality time with Calix to even give that impression. He just seem territorial because he likes her and she keeps technically stopping his advances even if she isn’t aware… she’s technically not divorced there was no legal process and the grandfather refused to finalize it. She still see calix as her brother in law.