Some (homewrecker) In-ho headcanons for yuri inhun because I can. 💖
Warning for In-ho being an obsessed stalker but that's just par for the course with any version of In-ho.
Still a former cop just because it could be hot for fictional purposes, why not?
Still had a wife, Ha-eun, in every sense of the word except through legal means. They were considering other countries to potentially move to so that they could get officially married and possibly start a family through IVF. As in canon, Ha-eun unfortunately got sick and passed away before those dreams could become a reality.
Deep into debt with no end in sight, In-ho is approached by Oh Il-nam and (very reluctantly) enters a marriage of convenience.
He soon passes as well. Given his cancer prognosis, it was ruled that Il-nam died due to his medical condition, not that authorities could prove otherwise. In-ho ends up inheriting his wealth, his estate, his business, etc. Takes charge of his company following his death.
In-ho first sees Gi-hun at a charity event. Accompanying her husband, Sang-woo, he was there to try and impress his boss, make connections, vie for a promotion. However, Gi-hun looked as bored as In-ho felt, but her beauty captivated In-ho, left her speechless. Of course, every attempt In-ho made to meet her was thwarted that evening, so she had to resort to other means to see her again.
Uses one of her contacts (who we know as the Recruiter/Salesman) to find out everything she can on Seong Gi-hun. How she went from working woman to lonely housewife. How she and Sang-woo had tried and failed many times to have a baby. How their marriage was barely hanging on by a thread anymore.
In-ho is unapologetically obsessed, believes that Gi-hun is hers, will be her wife in time, that she can give her a better life, make her happier than her husband ever could.
So she moves in from her big, fancy mansion to an apartment in Seoul right next to the (un)happy couple. She befriends Gi-hun, often invites her over, always has impeccable timing, always knows when she's feeling down or what she wants to cheer her up, almost as if she could see inside Gi-hun's mind, or her apartment. Lets Gi-hun all but have free rein over how to decorate their In-ho's new place, and In-ho keeps insisting that she make herself at home.
In-ho being opportunistic. She knows Gi-hun's had a girlfriend before, Eun-ji, so she's open to being with women at least. In-ho picks up on some signs that the attraction could be mutual, honestly would have put on her act even if she wasn't certain. Is the type to time it right so that Gi-hun spills coffee down her shirt, so now she has to take it off. If she ever takes her out to a beach or on the water, would 100% ask her to put sunscreen on her back for her, and it's driving them both crazy.
Then there's the "accident." Haven't decided if Sang-woo winds up dead or in a coma. If the latter, I could see it being a failed attempt on his life (by who, I wonder), but there are enough clues left behind to make Gi-hun start digging to find the truth. In-ho being there to comfort her in this time of grief, ends up moving Gi-hun to her mansion, claiming that being cooped up in her apartment will do her no good and she could do with a change of scenery.
Truth is, she's happy to finally have her pretty wife at home, and she can't wait to spoil her like she deserves.