The 4th house is the house of the mother, the heart, and domestic peace. Ketu is the planet of detachment and cutting ties.
When Ketu sits in the 4th house, it creates a deep emotional disconnect between the native and their mother. Dr. Sharma reveals the exact behavioral *Nishaniya* of this placement.
This person develops a habit of completely ignoring advice or requests. Even when their own mother speaks to them, they will pretend they didn't hear her ("sunkar bhi ansuni si kar deta hai"). They are so emotionally detached that they will bluntly refuse their mother's requests ("maa ko bhi mana kar deta hai"), causing deep pain in the household.