Why is Sarbjit so close to Richa's heart?

Richa Chadha will soon be seen essaying the role of Sukhpreet in Sarabjit. The actress plays the role of Sarabjit's wife in a movie that will show the real struggle of a man who was falsely convicted in a terrorism case and was released from the jail after 17 years of fight. The film's crucial element is Sarabjit's sister who along with Sarabjit's wife fought a case for 17 years to get justice. 

Richa herself has two brothers in real life and for her the bond in the movie is so powerful between the siblings that Richa feels extremely close to the movie. Richa says, "My brothers mean a lot to me and to see a film which speaks about a sister's struggle to get justice for her brother gives me chills. It is such an amazing human story of survival and I have to brother who have been my support system. To be a part of a movie of this nature sure makes it very special for me".