whatever taeha's motive was to being mincheol's "backer," mincheol's decision to treat haesoo like shit and cheat on her is still all his haesoo has been tolerating him all this time so cheating was her last straw
I can't say that taeha is stealing another man's wife since they're already divorced way before after all the debt problems the two had lmaoooo
I don’t feel like Taeha has the intention to separate them by giving Mincheol a job. If he has that intention, he would hire someone who will seduce minch to make him cheat to Haesoo. Ari is just a casualty too. More like Taeha just wanted to help her by giving her husband a job but that asshole chose to take for granted and cheat. That’s why Taeha step in? I hope so.

Correct me if I’m wrong
What if taeha gave mincheol a job at that company so he could provide for haesoo properly, but mincheol ended up cheating, which is why taeha is trying to separate them?
Or
What if taeha set mincheol up to work at that company so he would cheat, so haesoo would get hurt and want to leave him? No matter how hard life is with mincheol, she can’t leave him, so taeha creates a trap so haesoo can move on from him. Does that make taeha someone who steals another man’s wife?
But no matter which one is true, mincheol is definitely the bad one because he’s a cheater, making him an asshole