Sung Jin's Shadow

So Tae Joo decided to be the shadow who works in the back for Min Jae's sake; does that mean that Min Jae is getting hold of everything now? And if he does, will he split everything to half with Tae Joo like he promised? Because Dong Sung promised Dong Jin to split everything to half with him but he went back on his word and he's his brother, what about a mere friendship? You simply can't trust anyone in that world.