I think Taeha's brother will not only find out about Haesoo, but Mincheol as well and use him against Taeha. With the brother's support this will level the playing field between Mincheol and Taeha.
I agree that the two will find out about Taeha's and Haesoo's relationship at some point... But in some way, I don't think it's going to matter to Taeha, because he has shown himself to be the type that thinks ahead and anticipates future possibilities and risks, so I think he is prepared for those eventual scenarios with his brother and her ex. In addition, Taeha is very possessive and protective of his girl. And thanks to his upbringing (being constantly bullied and beaten by his half-brother, until he finally got older and big enough to defend himself), Taeha has no problems beating the brakes off of people with his own bare hands when it comes to anyone who threatens him or anyone/thing that he cares about! Min-shit is nothing but an overgrown schoolyard bully with a temper, who realized the hard way that he is outclassed in a fight with Taeha, and he is scared! Taeha's brother also has his fears of Taeha- as we saw in his flashback memory while talking to his bodyguard about what his brother is like, when he recalled Taeha finally fighting back when they were younger. Even if Min-shit and Taeha's brother work together, I don't think they can win.
I think Taeha's brother will not only find out about Haesoo, but Mincheol as well and use him against Taeha. With the brother's support this will level the playing field between Mincheol and Taeha.
I agree that the two will find out about Taeha's and Haesoo's relationship at some point... But in some way, I don't think it's going to matter to Taeha, because he has shown himself to be the type that thinks ahead and anticipates future possibilities and risks, so I think he is prepared for those eventual scenarios with his brother and her ex. In addition, Taeha is very possessive and protective of his girl. And thanks to his upbringing (being constantly bullied and beaten by his half-brother, until he finally got older and big enough to defend himself), Taeha has no problems beating the brakes off of people with his own bare hands when it comes to anyone who threatens him or anyone/thing that he cares about! Min-shit is nothing but an overgrown schoolyard bully with a temper, who realized the hard way that he is outclassed in a fight with Taeha, and he is scared! Taeha's brother also has his fears of Taeha- as we saw in his flashback memory while talking to his bodyguard about what his brother is like, when he recalled Taeha finally fighting back when they were younger.
Even if Min-shit and Taeha's brother work together, I don't think they can win.