Assistant Sessions Judge S M Mahadik convicted the accused, Gautam Yedba Kasabe, of Narpoli in Bhiwandi town here, on Saturday under section 306 (abetment of suicide) of the IPC and awarded him two years' simple imprisonment along with a fine of Rs 2,000.
According to prosecution, the victim, 37-year-old Vaishali, was married to Kasabe's son Dinesh for 11 years and the couple had two children.
Kasabe, in an inebriated state, used to frequently abuse, ill-treat and harass her.
Unable to bear the constant harassment, she set herself on fire when the other family members were asleep. She was rushed to hospital where she succumbed to her burns, the prosecution told the court.
Eight witnesses, including the woman's husband, mother and neighbours deposed in connection with the case.
The court relied on deposition of all the witnesses and held the accused guilty.