India, Dec. 1 -- Nita Ambani made a staff member's birthday extra-special by joining her celebration. In an undated video shared on Instagram, the chairperson of Reliance Foundation was seen standing next to the staff member as she cut her birthday cake.

Nita Ambani is the wife of Reliance Industries chairman Mukesh Ambani. The couple has three children - Isha, Akash and Anant. The Ambani family has a net worth of $105 billion, according to a Forbes estimate, making Mukesh Ambani the richest person in India. The family splits their time between Mumbai - where their residence Antilia is one of the world's most expensive private residences - and Jamnagar, where they own a sprawling township.

In the undated video shared by an Instagram fan...