Not even gonna argue on that fr overall everyone in this manhwa doing some fucked shit. Real rational for me is that he at least stopped ig that bare minimum but at least he didn’t try pheromone trap mc for years until the point mc couldn’t make their own choice on if he really loved him or not, which within itself is violation of his own autonomy equal to get him drunk. ML basically groomed MC for years. Old guy is just Lesser of two evils

Ngl the older guy is way better than the ML