Their two kids are with their maternal grandfather in the capital's Khan Market area.
Chatto was hanging from the tree by a red sari. Her husband, a driver, was hanging from a nearby electric pole by a thick rope.
Katiyar's neck had a strangulation mark and had sustained scratches on his chin.
Chatto's neck also had a strangulation mark and there was no other injury visible on her body.
The Noida police chief said both left their house late Sunday after an altercation over Chatto's brother Vijay staying with them for the last seven years.