Indore (Madhya Pradesh): A 40-year-old restaurant owner allegedly killed his wife by stabbing her in the neck before committing suicide by hanging himself at their rented house in Sai Vihar Colony in Rau area on Diwali. Police said on Monday that a dispute over his wife's suspected extramarital affair may have triggered the incident.Rau police station in-charge Rajpal Singh Rathore identified the deceased as Pawan Soni (40) and his wife Varsha (35).