Suspecting his wife of having an extra marital affair, a 35-year-old Nalasopara-based auto driver stabbed her to death in front of their three children, in the wee hours of Friday. The matter came to light when the kids revealed the incident to their grandfather, who recovered the body from their residence. The Tulinj police have arrested the accused Ajay Yadav and are investigating the case further. The deceased has been identified as Saroj Yadav.