It is really heartening to see your concern about your brother, and timely help will definitely be fruitful. That said you shall have to convince both your brother and his wife for seeking professional help. Once that is done, you will have to decide whether you would want to go to public or pvt set up for counselling. IHBAS is a good govt hospital with such services. In pvt you will have to look for a clinical psychologist or psychiatrist in your vicinity. I wish you luck in your endeavours.

Hi, I think you first consult with a psychiatrist. He will evaluate things first and then do accordingly like if he diagnose some psychiatric illness then manage that. Along with that if there is some adjustment or personality issues he do accordingly. There are other modalities to handle such problems like psychosocial intervention including couple therapy etc. Best to see a psychiatrist.