
Okaaaaaay psycho. I hope dojin fights him back, he needs to stop being that good.
But why didn't jinju warn dojin tho???

Probably because Dojin wants to believe in the best in people. Since he tends not to judge people, he would be more likely to ignore her warning. Plus he has more years with that guy than her. I mean, they are truly childhood friends, would you believe your significant other if they told you your best friend is cray cray?And on top of that, before Dojin meet Tae hee, he didn't even consider being in a same sex relationship. So trying to tell him that his best childhood friend is possible in love with him....yeahhh, you would probably loss all credibility at that point.
So I'm guessing he wants to tell her what he assumes, that bil had a male lover and only married her for show... Pretty convinient of him. But I guess their family knows that he has a crush on the cousin and don't like that. Also the cousin seems to have a weird relationship with the family. Idk everything is confusing lol