CHENNAI: Two days after a suspected suicide pact in Perambur in which a man and his son died, the wife, who was under treatment, succumbed on Thursday, leaving behind the couple's 8-year-old daughter.

The family had consumed a cake, with 'Happy Family' inscribed on it, laced with poison.

Preliminary investigations revealed that the woman was undergoing cancer treatment, which had distressed the family.

The 8-year-old daughter called the police control room on Wednesday morning, after which a police team broke into the house and found the man, S Sagaya Sebastian (43) and his son, Ivan Anto (4), dead, and moved Rexy Beula (38) and the daughter, Evangelin, to a hospital, where Beula succumbed.