He took both the girls after Gopi went to jail & lied to the girls about their mom. And when Meera went out of control, he easily says that Meera is a stranger to him, she is dead & blah blah.
Had he told the truth to Meera about Radha, she would have believed it & patched up with Gopi. But he didn't do it.
He also alleged Gopi about taking her own decisions & did not consult him. Before going there, she called him up to inform him but he didn't pick the call. It was Kokila who told her that she will tell this to Ahem later. It is his fault that he didn't pick the call.
I knew something like this would happen in times of crisis & that is why I didn't want them to reunite.