Hope CV's explain SP's motive behind carrying gun.
It is sad to see SP behave in this manner. He wanted to push Aarti and Ansh into Prashant's hands and take away Yash.
SP didn't even have any concern that Aarti is pregnant and was in an unfortunate situation created by a evil person named prashant. How can someone be Soo cruel towards a pregnant girl and a innocent kid ?
How can SP even think that Yash will break up with Aarti ? By God's grace Yash is not a person who will forget his commitment to his wife Aarti and his son Ansh. For Yash Aarti, Palak, Payal, Ansh all are important.