u/indian_neo21

All characters are Indians.

Man A lives alone and friends with neighbours. In the neighbouring house/flat lives man B with his wife and widow Mother in law.

The mother in law approaches Man A for satisfying/impregnating her daughter.

Man A hatches a plan that Man B would be able to get proper erection and satisfy/impregnate his wife. While Man A provides the stimulation and fucks the mother in law.