Navi Mumbai: A 22-year-old woman and her two-year-old son were reportedly smothered to death at their Kamothe residence in Navi Mumbai by her unemployed brother-in-law, police said on Tuesday. The accused, identified as Suresh Chavan (29), was arrested on Tuesday morning. A Kamothe police station officer said Suresh used to stay with the family of his younger brother in Kamothe which falls under the Panvel City Municipal Corporation (PCMC) limits. Allegedly, on Monday night, Suresh smothered Jaishree and her son Avinash with one pillow after another. The accused sat next to the bodies until his younger brother returned home from the office around 11:30 pm, "police officials said. After his brother called the police, Suresh was arrested from the flat in the wee hours on Tuesday. He has been booked for murder under section 302 of the Indian Penal Code (IPC).