The accused were identified as M Muthumari (38) of Nochikulam village near Senthamaram and Sasikumar (49) of Vadanathampatti near Veerasikamani.
At around 10 pm, another fight broke out between the couple and in a fit of rage, Raghuraj poured kerosene on Lilima and set her on fire.
The couple allegedly spread rumours saying that Veena was involved in an extra-marital relationship.
Furious at marriage offer being rejected, accused stabbed the victim on head, stomach
The police said the accused duo hatched a plan to kill Shankar after he learned about their illicit relationship.
The woman’s husband who was waiting at a nearby house for Shafi, returned home along with his relatives and caught Shafi and his wife together.
Police said the boy was murdered by his mother’s boyfriend as the teen informed his father about their affair.
Reportedly due to marital problems, the husband left the house and started living with another woman.